Federal Register
Federal Air Rule Tracker
218 documents
- Proposed rulePublished Oct 19, 202640 CFR 52Air Quality Plan; Arizona; Agricultural Best Management Practices Rules for the West Pinal County PM10 Nonattainment Area
The U.S. Environmental Protection Agency (EPA) is proposing to approve a revision to the Arizona Department of Environmental Quality (ADEQ or "State") portion of the Arizona State Implementation Plan (SIP). This revision concerns emissions of particulate matter (PM) that are 10 micrometers ([mu]m) or smaller in diameter (PM<INF>10</INF>) from agricultural crop and animal operations in the West Pinal County PM<INF>10</INF> nonattainment area. We are proposing to approve two local rules to regulate these emission sources under the Clean Air Act (CAA or "Act").
Comments close Nov 18, 2026Docket EPA-R09-OAR-2024-0600, FRL-13422-01-R9FR Doc. 2026-21289
- Proposed rulePublished Oct 19, 202640 CFR 52Air Quality Plan; Arizona; Pinal County Air Quality Control District; West Pinal County PM10 Nonattainment Area; Fugitive Dust Rules
The U.S. Environmental Protection Agency (EPA) is proposing to approve revisions to the Pinal County Air Quality Control District (PCAQCD or "District") portion of the Arizona State Implementation Plan (SIP). These revisions concern emissions of particulate matter (PM) that is 10 micrometers or smaller in diameter (PM<INF>10</INF>) from fugitive dust sources, including open areas/vacant lots, unpaved lots, unpaved roads, paved public roadways, and construction sites. We are proposing to approve local rules to regulate these emission sources under the Clean Air Act (CAA or "Act").
Comments close Nov 18, 2026Docket EPA-R09-OAR-2026-5581, FRL-13513-01-R9FR Doc. 2026-21287
- Proposed rulePublished Oct 19, 202640 CFR 52Approval and Promulgation of Implementation Plans-Pinal County (Part); West Pinal, AZ PM10 Nonattainment Area; Moderate Area, Serious Area, and Section 189(d) Plan for Attainment of the 24-Hour PM10 Standard
The U.S. Environmental Protection Agency (EPA) is proposing to approve a state implementation plan (SIP) revision submitted by the State of Arizona to meet Clean Air Act (CAA or "Act") requirements applicable to the Pinal County (Part); West Pinal PM<INF>10</INF> nonattainment area ("West Pinal County PM<INF>10</INF> Nonattainment Area"). The EPA is proposing to find that the submitted SIP revision meets all applicable "Moderate" area, "Serious" area, and CAA section 189(d) requirements for the PM<INF>10</INF> national ambient air quality standards (NAAQS). Additionally, the EPA is proposing t
Comments close Nov 18, 2026Docket EPA-R09-OAR-2026-5119, FRL-13482-01-R9FR Doc. 2026-21288
- Final rulePublished Oct 19, 202640 CFR 52Approval and Promulgation of Implementation Plans; Arizona; Revisions to the Cleaner Burning Gasoline, Winter Oxygenated Fuel, and Gasoline Set-Aside Programs
The U.S. Environmental Protection Agency (EPA) is finalizing an approval of a revision to the Arizona State Implementation Plan (SIP) submitted by the Arizona Department of Environmental Quality (ADEQ). This revision includes statutes and regulations amending the Cleaner Burning Gasoline (CBG) program, which is a control measure in the greater Phoenix metropolitan area to reduce emissions of ozone- forming pollutants, carbon monoxide (CO), and particulate matter. Additionally, this revision addresses the Winter Oxygenated Fuel program to control CO emissions in the Tucson area. Finally, this r
Effective Nov 18, 2026Docket EPA-R09-OAR-2023-0054, FRL-12607-02-R9FR Doc. 2026-21268
- Proposed rulePublished Oct 19, 202640 CFR 6040 CFR 6140 CFR 63New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Northwest Clean Air Agency, Washington State
The Northwest Clean Air Agency (NWCAA), located in Washington State, submitted updated regulations for receiving delegation and approval of its program for the implementation and enforcement of newly issued or revised New Source Performance Standards (NSPS) and National Emission Standards for Hazardous Air Pollutants (NESHAP), as provided for under previously approved delegation mechanisms. The updated regulations incorporate by reference certain NSPS and NESHAP promulgated by the Environmental Protection Agency (EPA) as they existed through October 18, 2023. The EPA is providing notice that i
Comments close Nov 18, 2026Docket EPA-R10-OAR-2026-4291, FRL-13409-01-R10FR Doc. 2026-21383
- Final rulePublished Oct 14, 202640 CFR 98Extending the Reporting Deadline Under the Greenhouse Gas Reporting Rule for Reporting Year 2025 to March 10, 2027
The Environmental Protection Agency (EPA) is taking interim final action to extend the reporting deadline under the Greenhouse Gas Reporting Rule for reporting year 2025 data from October 30, 2026, to March 10, 2027. This final action only changes the reporting deadline for annual greenhouse gas reports for reporting year 2025 and makes no other changes to the rule. The EPA is requesting comments on all aspects of this interim final rule.
Effective Oct 14, 2026Comments close Nov 30, 2026Docket EPA-HQ-OAR-2025- 0186, FRL-12720.2-01-OARFR Doc. 2026-20982
- Final rulePublished Oct 9, 202640 CFR 52Air Plan Approval; Michigan; Clean Data Determination for the Berrien, MI and Muskegon, MI Areas for the 2015 Ozone Standards
The U.S. Environmental Protection Agency (EPA) is determining under the Clean Air Act (CAA) that the Berrien County and Muskegon County, Michigan nonattainment areas have attained the 2015 ozone National Ambient Air Quality Standards (NAAQS). This determination, informally known as a clean data determination, is based upon complete, quality assured, and certified ambient air monitoring data for the 2023-2025 design value period showing that the areas achieved attainment of the 2015 ozone NAAQS. This clean data determination also relies upon the Michigan Department of Environment, Great Lakes,
Effective Oct 9, 2026Docket EPA-R05-OAR-2026-1354, FRL-13264-02-R5FR Doc. 2026-20736
- Final rulePublished Oct 8, 202640 CFR 52Air Plan Approval; GA; Removal of Nonattainment Area New Source Review
The U.S. Environmental Protection Agency (EPA or Agency) is approving a State Implementation Plan (SIP) revision submitted by the State of Georgia through the Georgia Environmental Protection Division (EPD) on June 27, 2024. The revision removes permitting requirements related to nonattainment, including nonattainment new source review (NNSR), from Georgia's SIP as obsolete, removes certain provisions related to the use of emission reduction credits (ERCs), and makes other changes based upon the lack of any areas designated as nonattainment for the National Ambient Air Quality Standards (NAAQS
Effective Nov 9, 2026Docket EPA-R04-OAR-2024-0626, FRL-12934-02-R4FR Doc. 2026-20636
- Final rulePublished Oct 8, 202640 CFR 52Air Plan Approval; Kentucky; Louisville Area Limited Maintenance Plan for the 1997 8-Hour Ozone NAAQS
The U.S. Environmental Protection Agency (EPA or Agency) is approving a State Implementation Plan (SIP) revision submitted by the Commonwealth of Kentucky through the Energy and Environment Cabinet (Cabinet) on behalf of the Louisville Metro Air Pollution Control District (District) via a letter dated June 3, 2024. The SIP revision consists of a Limited Maintenance Plan (LMP) for the Kentucky portion of the bi-state Louisville, Kentucky-Indiana 1997 8-hour ozone maintenance area (the "bi-state Louisville Area"). The Kentucky portion of the bi-state Louisville Area is comprised of Bullitt, Jeff
Effective Nov 9, 2026Docket EPA-R04-OAR-2024-0295, FRL-13322-02-R4FR Doc. 2026-20641
- Final rulePublished Oct 8, 202640 CFR 52Air Plan Approval; Maryland; Reasonably Available Control Technology for Municipal Waste Combustors
The U.S. Environmental Protection Agency (EPA) is approving state implementation plan (SIP) revisions submitted by the State of Maryland. The SIP revisions consist of a regulation that implements statewide reasonably available control technology (RACT) requirements by limiting air emissions of oxides of nitrogen (NO<INF>X</INF>) from municipal waste combustors (MWCs) in Maryland. This action is being taken under the Clean Air Act (CAA).
Effective Nov 9, 2026Docket EPA-R03-OAR-2019-0295, EPA-R03-OAR-2025-0267, FRL-12837-02-R3FR Doc. 2026-20635
- Final rulePublished Oct 8, 202640 CFR 52Air Plan Approval; Missouri; Construction Permit Exemptions
The U.S. Environmental Protection Agency (EPA) is approving revisions to the Missouri State Implementation Plan (SIP) received on February 10, 2026. The submission revises Missouri's regulation on construction permit exemptions in its Minor New Source Review (NSR) program. These revisions refine exemptions for emergency generators, update references to other rules, and update recordkeeping requirements. The EPA's final approval of this rule revision is being done in accordance with the requirements of the Clean Air Act (CAA).
Effective Nov 9, 2026Docket EPA-R07-OAR-2026-5182, FRL-13486-02-R7FR Doc. 2026-20634
- Final rulePublished Oct 8, 202640 CFR 52Air Plan Approval; Oklahoma; Interstate Transport Requirements for the 2010 SO2 NAAQS
Pursuant to the Federal Clean Air Act (CAA or the Act), the U.S. Environmental Protection Agency (EPA) is approving portions of the State Implementation Plan (SIP) submittal from the State of Oklahoma demonstrating that the State satisfies the interstate transport requirements of the CAA for the 2010 1-hour sulfur dioxide (SO<INF>2</INF>) primary National Ambient Air Quality Standard (NAAQS). This provision requires each State's implementation plan to contain adequate requirements prohibiting the interstate transport of air pollution in amounts that will contribute significantly to nonattainme
Effective Nov 9, 2026Docket EPA-R06-OAR-2025-2270, FRL-13190-02-R6FR Doc. 2026-20640
- Proposed rulePublished Oct 8, 202640 CFR 52Air Quality Plan; Arizona; Maricopa County Air Quality Department; New Source Review; Emission Reduction Credits-Rule 204
The U.S. Environmental Protection Agency (EPA) is proposing to approve a revision to the Maricopa County Air Quality Department (MCAQD or "Department") portion of the Arizona State Implementation Plan (SIP). This revision establishes a federally enforceable program allowing nonroad engine fleet owners/operators to generate emission reduction credits (ERCs) by either retrofitting their nonroad engines or replacing their nonroad engines with lower-emitting nonroad engines while meeting other Clean Air Act (CAA or "Act") requirements. These ERCs are intended for use as offsets for major stationar
Comments close Nov 9, 2026Docket EPA-R09-OAR-2026-4654, FRL-13434-01-R9FR Doc. 2026-20612
- Final rulePublished Oct 8, 202640 CFR 52Approval and Promulgation of State Implementation Plans; New Jersey; RACT Certifications for the 2008 and 2015 Ozone National Ambient Air Quality Standards
The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the State of New Jersey for purposes of certifying and meeting the requirements for Reasonably Available Control Technology (RACT) for the Serious classification of the 2008 and the Moderate classification of the 2015 8-hour ozone National Ambient Air Quality Standards (NAAQS). The EPA is also approving that the SIP revisions fulfill SIP requirements pertaining to the Ozone Transport Region (OTR) for the 2015 ozone NAAQS. These actions are being taken in accordance with the requiremen
Effective Nov 9, 2026Docket EPA-R02-OAR-2026-0793, FRL-13420-02-R2FR Doc. 2026-20638
- Proposed rulePublished Oct 7, 202640 CFR 62Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; West Virginia; Negative Declarations for Existing Large Municipal Waste Combustors and Other Solid Waste Incinerators
The Environmental Protection Agency (EPA) is proposing to approve the negative declarations submitted by the West Virginia Department of Environmental Protection (WVDEP) on July 13, 2026. The negative declarations submitted by WVDEP certify that there are no existing large municipal waste combustors (LMWC) or other solid waste incinerators (OSWI) subject to sections 111(d) and 129 of the Clean Air Act (CAA) within the jurisdiction of West Virginia.
Comments close Nov 6, 2026Docket EPA-R03-OAR-2026-6205, FRL-13584-01-R3FR Doc. 2026-20611
- Proposed rulePublished Oct 6, 202640 CFR 81Initial Air Quality Designations for the 2024 Revised Primary Annual Fine Particle (PM2.5) National Ambient Air Quality Standards (NAAQS)
The U.S. Environmental Protection Agency (EPA) is providing notice of the Agency's intended approach for area designations for the 2024 primary annual fine particulate matter (PM<INF>2.5</INF>) National Ambient Air Quality Standard (NAAQS) (the 2024 annual PM<INF>2.5</INF> NAAQS) under Clean Air Act (CAA) section 107(d). Details regarding these designations, as well as the EPA's notifications to States, territories, and Tribes regarding their initial area designations are accessible via the Agency's website and public electronic docket. With this notice, the EPA is providing an opportunity for
Comments close Nov 5, 2026Docket EPA-HQ-OAR-2024-0078, FRL-11650-03-OARFR Doc. 2026-20468
- Final rulePublished Oct 1, 202640 CFR 52Air Plan Approval; Missouri; Control of NOX Emissions From Large Stationary Internal Combustion Engines
The U.S. Environmental Protection Agency (EPA) is approving revisions to the Missouri State Implementation Plan (SIP) related to Control of Nitrogen Oxide (NO<INF>X</INF>) Emissions From Large Stationary Internal Combustion Engines. The revisions reformat and revise reporting, recordkeeping, and compliance requirements; incorporate other State rules by reference; add definitions specific to the rule; revise unnecessarily restrictive or duplicative language; and make administrative wording changes. The revisions also add an exemption for certain spark-ignited internal combustion engines. The EP
Effective Nov 2, 2026Docket EPA-R07-OAR-2026-4819, FRL-13460-02-R7FR Doc. 2026-20096
- Proposed rulePublished Oct 1, 202640 CFR 52Air Plan Approval; OR; Lane County Title 36 Rule
The Environmental Protection Agency (EPA) is proposing to approve into the Oregon State Implementation Plan revisions to the rules applicable in Lane County Oregon. The revisions establish procedures related to excess emissions, clarify terminology and enforceability, and update Local regulations to more closely align with State rules. The EPA is proposing to approve these revisions as meeting the requirements of the Clean Air Act.
Comments close Nov 2, 2026Docket EPA-R10-OAR-2026-3763, FRL-13378-01-R10FR Doc. 2026-20101
- Proposed rulePublished Oct 1, 202640 CFR 52Approval of Implementation Plans for Air Quality Planning Purposes; State of Nevada; Truckee Meadows Second 10-Year Maintenance Plan for the 1987 PM-10 Standard
The U.S. Environmental Protection Agency (EPA) is proposing to approve the "Second 10-Year Maintenance Plan for the Truckee Meadows 24-Hour PM<INF>10</INF> Attainment Area" ("Truckee Meadows Second PM<INF>10</INF> Maintenance Plan" or "Plan") as a revision to the Washoe County portion of the State implementation plan (SIP) for the State of Nevada. The Truckee Meadows Second PM<INF>10</INF> Maintenance Plan includes, among other elements, a base year emissions inventory, a maintenance demonstration, contingency provisions, and motor vehicle emissions budgets for use in transportation conformity
Comments close Nov 2, 2026Docket EPA-R09-OAR-2025-1978, FRL-13551-01-R9FR Doc. 2026-20102
- Final rulePublished Oct 1, 202640 CFR 52Attainment Date Extension for the South Coast, California 2012 Annual PM2.5 Fine Particulate Matter Nonattainment Area
The U.S. Environmental Protection Agency (EPA or "Agency") is granting an extension of the "Serious" area attainment date for the Los Angeles-South Coast Air Basin ("South Coast Air Basin" or "South Coast") nonattainment area for the 2012 annual fine particulate matter less than or equal to 2.5 [micro]m in diameter (PM<INF>2.5</INF>) national ambient air quality standards (NAAQS) from December 31, 2025, to December 31, 2030, based on a determination that the State has satisfied the statutory criteria for this extension.
Effective Nov 2, 2026Docket EPA-R09-OAR-2026-3664, FRL-13379-02-R9FR Doc. 2026-20097
- Proposed rulePublished Sep 30, 202640 CFR 52Air Plan Approval; Reconsideration and Repeal of Air Plan Partial Approval and Partial Disapproval of North Dakota's Regional Haze State Implementation Plan for the Second Implementation Period; Correction
On September 9, 2026 the U.S. Environmental Protection Agency (EPA or Agency) proposed to repeal a final rule published in the Federal Register (FR) on December 2, 2024, partially approving and partially disapproving North Dakota's 2022 regional haze State Implementation Plan (SIP) submission for the second implementation period. The EPA proposed in the same action to approve the portions of North Dakota's 2022 SIP submission for the second implementation period that were disapproved in the EPA's 2024 partial approval/partial disapproval. The ADDRESSES section of the proposed rulemaking contai
Comments close Oct 9, 2026Docket EPA-R08-OAR-2023-0495, FRL-13512-03-R8FR Doc. 2026-20060
- Final rulePublished Sep 29, 202640 CFR 7040 CFR 71Rescission of Title V Emergency Affirmative Defense Rule; Corrections
On June 1, 2026, the U.S. Environmental Protection Agency (EPA) published a final rule titled "Rescission of Title V Emergency Affirmative Defense Rule." After publication, the EPA discovered inadvertent typographical errors in the action. This document corrects the errors and ensures the regulatory text restored on June 1, 2026, matches the original regulatory text codified in Federal regulations prior to their removal following the 2023 Affirmative Defense Rule. The corrections described in this action do not affect the emergency affirmative defense provisions codified in 40 CFR parts 70 and
Effective Sep 29, 2026Docket EPA-HQ-OAR-2016-0186, FRL-8961.2-02-OARFR Doc. 2026-19889
- Proposed rulePublished Sep 28, 202640 CFR 6040 CFR 63National Emission Standards for Hazardous Air Pollutants for Gasoline Distribution Facilities and Standards of Performance for Bulk Gasoline Terminals Reconsideration
On May 8, 2024, the U.S. Environmental Protection Agency (EPA) published the National Emission Standards for Hazardous Air Pollutants (NESHAP): Gasoline Distribution Technology Reviews and New Source Performance Standards (NSPS) Review for Bulk Gasoline Terminals final rule ("2024 Final Rule"). The EPA is reconsidering various provisions of the 2024 Final Rule in this proposed rule, including the operating limits and continuous compliance requirements for air emission control devices, and the vapor tightness requirements for gasoline cargo tanks. The EPA is also reconsidering the modification
Comments close Nov 12, 2026Docket EPA-HQ-OAR-2025-0302, FRL-8202.1-01-OARFR Doc. 2026-19774
- Final rulePublished Sep 25, 202640 CFR 52Air Plan Approval; Kentucky; Campbell-Clermont Area Maintenance Plan for the 2010 1-Hour SO2 NAAQS
The U.S. Environmental Protection Agency (EPA or Agency) is approving a State Implementation Plan (SIP) revision submitted by the Commonwealth of Kentucky, through the Kentucky Division for Air Quality (DAQ), on February 20, 2025. The SIP revision includes the second 10- year maintenance plan for the Kentucky portion of the Campbell- Clermont, Kentucky-Ohio maintenance area ("Campbell-Clermont, KY-OH Area" or "Area") for the 2010 1-hour sulfur dioxide (SO<INF>2</INF>) National Ambient Air Quality Standards (NAAQS). The Kentucky portion of the Area is comprised of a part of Campbell County. The
Effective Nov 24, 2026Comments close Oct 26, 2026Docket EPA-R04-OAR-2025-0244, FRL-13461-02-R4FR Doc. 2026-19668
- Proposed rulePublished Sep 25, 202640 CFR 52Air Plan Approval; Kentucky; Campbell-Clermont Area Maintenance Plan for the 2010 1-Hour SO2 NAAQS
The U.S. Environmental Protection Agency (EPA) is proposing to approve a State Implementation Plan (SIP) revision submitted by the Commonwealth of Kentucky on February 20, 2025, for the purpose of establishing a second 10-year maintenance plan for the Kentucky portion of the Campbell-Clermont, Kentucky-Ohio maintenance area for the 2010 1-hour sulfur dioxide National Ambient Air Quality Standards. The EPA is proposing to approve this SIP revision because the Commonwealth has demonstrated that it is consistent with the Clean Air Act.
Comments close Oct 26, 2026Docket EPA-R04-OAR-2025-0244, FRL-13461-01-R4FR Doc. 2026-19667
- Final rulePublished Sep 25, 202640 CFR 7040 CFR 71Clarifying the Scope of “Applicable Requirements” Under State Operating Permit Programs and the Federal Operating Permit Program
The U.S. Environmental Protection Agency (EPA) is updating the title V operating permit program regulations to codify the Agency's existing interpretations and policies concerning when and whether "applicable requirements" established in other Clean Air Act (CAA) programs may be reviewed, modified, and/or implemented through the title V operating permit program. Specifically, this final rule clarifies the limited situations in which requirements under the New Source Review (NSR) preconstruction permitting program would be reviewed using the EPA's title V oversight authorities. Additionally, th
Effective Oct 26, 2026Docket EPA-HQ-OAR-2023-0401, FRL-9118.1-02-OARFR Doc. 2026-19671
- Final rulePublished Sep 24, 202640 CFR 52Air Plan Approval; Alabama; Transportation Conformity
The U.S. Environmental Protection Agency (EPA or Agency) is approving a State Implementation Plan (SIP) revision submitted by the State of Alabama, through the Alabama Department of Environmental Management (ADEM) on April 7, 2026. The SIP revision replaces the previously approved transportation conformity memorandum of agreement (MOA) with an updated MOA concerning transportation conformity criteria and procedures related to interagency consultation, conflict resolution, public participation, and enforceability of certain transportation-related control and mitigation measures. The SIP revisio
Effective Oct 26, 2026Docket EPA-R04-OAR-2024-0362, FRL-13404-02-R4FR Doc. 2026-19566
- Proposed rulePublished Sep 23, 202640 CFR 52Air Plan Approval; North Carolina; Charlotte-Rock Hill Area Maintenance Plan for the 2008 8-Hour Ozone NAAQS
On February 28, 2025, the State of North Carolina, through the North Carolina Department of Environmental Quality, Division of Air Quality (NCDAQ), submitted a request for the U.S. Environmental Protection Agency (EPA) to approve a State Implementation Plan (SIP) revision containing the State's plan for maintaining the 2008 ozone National Ambient Air Quality Standard (NAAQS) through 2035 for the North Carolina portion of the bi-state Charlotte-Rock Hill, North Carolina-South Carolina 2008 8-hour ozone nonattainment area (the entire area is hereinafter referred to as the "bi-state Charlotte Are
Comments close Oct 23, 2026Docket EPA-R04-OAR-2025-0223, FRL-13259-01-R4FR Doc. 2026-19495
- Final rulePublished Sep 17, 202640 CFR 60Partial Repeal of the Carbon Pollution Standards for Fossil Fuel-Fired Electric Generating Units
In this final rule, the U.S. Environmental Protection Agency (EPA) is repealing most provisions of the 2024 Carbon Pollution Standards for greenhouse gas (GHG) emissions from fossil fuel-fired electric generating units (EGUs) based on a reevaluation of the best system of emission reduction for the relevant subcategories. Specifically, the EPA is repealing the emission guidelines for existing fossil fuel-fired steam generating units, the carbon capture and sequestration/storage (CCS)-based standards for coal-fired steam generating units undertaking a large modification, and the CCS-based standa
Effective Nov 16, 2026Docket EPA-HQ-OAR-2025-0124, FRL-12674-02-OARFR Doc. 2026-19071
- Proposed rulePublished Sep 17, 202640 CFR 60Rescission of the Greenhouse Gas Findings for Fossil Fuel-Fired Power Plants and Repeal of Regulations for Power Plant Greenhouse Gas Emissions Under Clean Air Act Section 111
In this action, the U.S. Environmental Protection Agency (EPA) is supplementing its proposal to repeal all greenhouse gas (GHG) emission standards for fossil fuel-fired electric generating units (EGUs) to effectuate the best reading of Clean Air Act (CAA) section 111. We propose that CAA section 111 does not authorize the EPA to regulate emissions from power plants in response to global climate change concerns. For the multiple and independent reasons described herein, this additional rationale would also require rescinding the Administrator's contrary findings and determinations in 2015 and r
Comments close Nov 2, 2026Docket EPA-HQ-OAR-2025-0124, FRL-12674.1-01-OARFR Doc. 2026-19072
- Final rulePublished Sep 14, 202640 CFR 52Approval and Promulgation of Implementation Plans; California; San Joaquin Valley, Revisions to Motor Vehicle Emissions Budgets for Ozone
The U.S. Environmental Protection Agency (EPA or "Agency") is taking final action to approve a revision to the State of California's state implementation plan (SIP) for the San Joaquin Valley (SJV) area. The revision includes an update to the SJV area's motor vehicle emissions budgets ("budgets") for nitrogen oxides (NO<INF>X</INF>) and volatile organic compounds (VOC) for the 2008 8- hour ozone national ambient air quality standards (NAAQS or "standards"). These updated budgets for 2026, 2029, and 2031 were developed with the latest modeling method approved for California. These updated budge
Effective Oct 14, 2026Docket EPA-R09-OAR-2026-3400, FRL-13355-02-R9FR Doc. 2026-18748
- Proposed rulePublished Sep 14, 202640 CFR 62Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; District of Columbia; Negative Declaration for Existing Other Solid Waste Incinerators
The Environmental Protection Agency (EPA) is proposing to approve the negative declaration submitted by the District of Columbia Department of Energy and Environment (DCDOEE) on May 21, 2026. The negative declaration submitted by DCDOEE certifies that there are no existing other solid waste incinerators (OSWI) subject to sections 111(d) and 129 of the Clean Air Act (CAA) within the jurisdiction of the District of Columbia (DC).
Comments close Oct 14, 2026Docket EPA-R03-OAR-2026-4522, FRL-13439-01-R3FR Doc. 2026-18759
- Proposed rulePublished Sep 14, 202640 CFR 62Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; Maryland; Negative Declaration for Existing Other Solid Waste Incinerators
The Environmental Protection Agency (EPA) is proposing to approve the negative declaration submitted by the Maryland Department of the Environment (MDE) on April 17, 2026. The negative declaration submitted by MDE certifies that there are no existing other solid waste incinerators (OSWI) subject to sections 111(d) and 129 of the Clean Air Act (CAA) within the jurisdiction of the State of Maryland.
Comments close Oct 14, 2026Docket EPA-R03-OAR-2026-4225, FRL-13428-01-R3FR Doc. 2026-18750
- Proposed rulePublished Sep 14, 202640 CFR 52Clean Data Determination; 1997 8-Hour Ozone Standards; California; Sacramento Metro Area
The U.S. Environmental Protection Agency (EPA or "Agency") is proposing to issue a clean data determination (CDD) for the Sacramento Metro, California nonattainment area to reflect our finding that the area is attaining the 1997 8-hour ozone national ambient air quality standards (NAAQS or "standards"). This finding is based on quality-assured and certified ambient air quality monitoring data from 2023 through 2025. If we finalize this CDD, certain Clean Air Act (CAA) requirements that apply to the Sacramento Metro area will be suspended for so long as the area continues to attain the 1997 8-h
Comments close Oct 14, 2026Docket EPA-R09-OAR-2026-4885, FRL-13450-01-R9FR Doc. 2026-18755
- Final rulePublished Sep 9, 202640 CFR 52Air Plan Approval; New York; Interstate Transport Requirements for the 2010 SO2 NAAQS
The Environmental Protection Agency (EPA or the Agency) is approving a State Implementation Plan (SIP) submitted by the State of New York for purpose of demonstrating that the State satisfies the interstate transport requirements, also known as the "good neighbor" provision of the Clean Air Act (CAA), for the 2010 1-hour sulfur dioxide (SO<INF>2</INF>) primary National Ambient Air Quality Standard (NAAQS). Under the good neighbor provision, each State's implementation plan must contain adequate provisions prohibiting the interstate transport of air pollution in amounts that will either contrib
Effective Oct 9, 2026Docket EPA-R02-OAR-2025-1047, FRL-13227-02-R2FR Doc. 2026-18324
- Proposed rulePublished Sep 9, 202640 CFR 52Air Plan Approval; Reconsideration and Repeal of Air Plan Partial Approval and Partial Disapproval of North Dakota's Regional Haze State Implementation Plan for the Second Implementation Period
The U.S. Environmental Protection Agency (EPA or Agency) is proposing to repeal a final rule published in the Federal Register on December 2, 2024, partially approving and partially disapproving North Dakota's 2022 regional haze State Implementation Plan (SIP) submission for the second implementation period. As a result, the EPA is proposing to approve the portions of North Dakota's 2022 SIP submission for the second implementation period that were disapproved in the EPA's 2024 partial approval/partial disapproval. In the December 2024 final rule, the EPA determined that North Dakota submitted
Comments close Oct 9, 2026Docket EPA-R08-OAR-2023-0495, FRL-13512-01-R8FR Doc. 2026-18290
- Final rulePublished Sep 9, 202640 CFR 52Air Plan Approvals; Indiana; Prong 4 (Visibility) for the 2015 Ozone National Ambient Air Quality Standard
The U.S. Environmental Protection Agency (EPA) is approving a portion of Indiana's State Implementation Plan (SIP) submission regarding the infrastructure requirements in Clean Air Act (CAA) section 110 for the 2015 ozone National Ambient Air Quality Standards (NAAQS). The infrastructure requirements are designed to ensure that the structural components of each State's air quality management program are adequate to meet the State's responsibilities under the CAA. The EPA finds that Indiana's infrastructure submission fulfills CAA requirements for a State's SIP to contain adequate provisions pr
Effective Oct 9, 2026Docket EPA-R05-OAR-2018-0788, FRL-13249-02-R5FR Doc. 2026-18334
- Final rulePublished Aug 27, 202640 CFR 52Air Plan Approval; Arkansas; Regional Haze State Implementation Plan for the Second Implementation Period
Pursuant to the Clean Air Act (CAA or the Act), the U.S. Environmental Protection Agency (EPA) is finalizing approval of a State Implementation Plan (SIP) revision submitted by the State of Arkansas through the Division of Environmental Quality (DEQ) on August 8, 2022, clarified by DEQ on July 29, 2025, and further supplemented on May 4, 2026, to satisfy the requirements of the Act and the EPA's Regional Haze Rule (RHR) for visibility protection in mandatory Class I Federal areas (Class I areas) for the program's second implementation period. Arkansas' SIP submission addresses the requirement
Effective Sep 28, 2026Docket EPA-R06-OAR-2022-0735, FRL-9405-02-R6FR Doc. 2026-17494
- Final rulePublished Aug 27, 202640 CFR 52Air Plan Approval; FL; Emissions Reporting Requirements and Permitting Forms
The U.S. Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the Florida Department of Environmental Protection (FDEP) on August 15, 2023. The revision updates reporting requirements; adds, updates, and renames forms for several permit applications; renumbers and updates the effective dates of various forms to align with programmatic changes; and improves the process for submitting forms across several rules within the Florida SIP. Additionally, the revision removes a rule concerning administrative permit corrections from the SIP. The EPA
Effective Sep 28, 2026Docket EPA-R04-OAR-2024-0484, FRL-13036-02-R4FR Doc. 2026-17490
- Proposed rulePublished Aug 27, 202640 CFR 52Air Plan Approval; Kentucky; Cincinnati-Hamilton Area Limited Maintenance Plan for the 1997 8-Hour Ozone NAAQS
The U.S. Environmental Protection Agency (EPA or Agency) is proposing to approve a State Implementation Plan (SIP) revision submitted by the Commonwealth of Kentucky through the Energy and Environment Cabinet (Cabinet), Division of Air Quality (Division), on July 23, 2024. The SIP revision consists of a Limited Maintenance Plan (LMP) for the Kentucky portion of the tri-state Cincinnati-Hamilton 1997 8-hour ozone nonattainment area (the "tri-state Cincinnati-Hamilton Area"). The Kentucky portion of the tri-state Cincinnati-Hamilton Area is composed of Boone, Campbell, and Kenton Counties in Ken
Comments close Sep 17, 2026Docket EPA-R04-OAR-2024-0440, FRL-13324-01-R4FR Doc. 2026-17502
- Proposed rulePublished Aug 27, 202640 CFR 52Air Plan Approval; Kentucky; Louisville Area Limited Maintenance Plan for the 1997 8-Hour Ozone NAAQS
The U.S. Environmental Protection Agency (EPA or Agency) is proposing to approve a State Implementation Plan (SIP) revision submitted by the Commonwealth of Kentucky through the Energy and Environment Cabinet (Cabinet) on behalf of the Louisville Metro Air Pollution Control District (District) via a letter dated June 3, 2024. The SIP revision consists of a Limited Maintenance Plan (LMP) for the Kentucky portion of the bi-state Louisville, Kentucky-Indiana 1997 8- hour ozone maintenance area (the "bi-state Louisville Area"). The Kentucky portion of the bi-state Louisville Area includes the Bull
Comments close Sep 17, 2026Docket EPA-R04-OAR-2024-0295, FRL-13322-01-R4FR Doc. 2026-17501
- Final rulePublished Aug 27, 202640 CFR 52Air Plan Approval; Michigan; 2015 Ozone Moderate Reasonably Available Control Technology
The U.S. Environmental Protection Agency (EPA) is approving revisions and additions to Michigan Air Pollution Control Rules (MAPCR) Parts 6 and 8 for inclusion in the Michigan State Implementation Plan (SIP). Michigan submitted these SIP revisions to meet the Moderate Volatile Organic Compound (VOC) and Nitrogen Oxide (NO<INF>X</INF>) Reasonably Available Control Technology (RACT) requirements for the Western Michigan nonattainment areas (Berrien, Western portion of Allegan, and Western portion of Muskegon counties) under the 2015 ozone National Ambient Air Quality Standard (NAAQS or standard)
Effective Sep 28, 2026Docket EPA-R05-OAR-2024-0137, EPA-R05-OAR-2025-0235, FRL-13185-02-R5FR Doc. 2026-17486
- Proposed rulePublished Aug 27, 202640 CFR 52Air Plan Approval; Mississippi; 2010 1-Hour SO2 NAAQS Transport Infrastructure
Pursuant to the Federal Clean Air Act (CAA or the Act), the U.S. Environmental Protection Agency (EPA or Agency) is proposing to approve a State Implementation Plan (SIP) revision submitted by the State of Mississippi, through the Mississippi Department of Environmental Quality (MDEQ), on January 27, 2022, for the purpose of complying with the "good neighbor" provision of the CAA for the 2010 1-hour sulfur dioxide (SO<INF>2</INF>) primary National Ambient Air Quality Standard (NAAQS). The good neighbor provision requires each State's implementation plan to contain adequate provisions prohibiti
Comments close Sep 17, 2026Docket EPA-R04-OAR-2023-0227, FRL-13502-01-R4FR Doc. 2026-17503
- Proposed rulePublished Aug 27, 202640 CFR 52Air Plan Approval; Oklahoma; Regional Haze Plan for the First Implementation Revision; Revision to State Implementation Plan and Requirements
Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is proposing to approve the State implementation plan (SIP) revision submitted by the State of Oklahoma on March 12, 2026, (Oklahoma's 2026 SIP submission) for the regional haze program's first implementation (planning) period. Oklahoma's 2026 SIP submission revises previously approved source-specific requirements for the American Electric Power/Public Service of Oklahoma (AEP/PSO) Northeastern Power Station as part of the State's long-term strategy for the first planning period. The EPA is propos
Comments close Sep 28, 2026Docket EPA-R06-OAR-2026-2080, FRL-13425-01-R6FR Doc. 2026-17499
- Proposed rulePublished Aug 27, 202640 CFR 62Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; Allegheny County; Negative Declaration for Existing Large Municipal Waste Combustors
The Environmental Protection Agency (EPA) is proposing to approve the negative declaration submitted by the Allegheny County Health Department (ACHD) on March 25, 2026. The negative declaration submitted by ACHD certifies that there are no existing large municipal waste combustors (LMWC) subject to the Clean Air Act (CAA) requirements within the jurisdiction of Allegheny County.
Comments close Sep 28, 2026Docket EPA-R03-OAR-2026-4027, FRL-13426-01-R3FR Doc. 2026-17497
- Proposed rulePublished Aug 27, 202640 CFR 62Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; City of Philadelphia; Negative Declarations for Existing Commercial and Industrial Solid Waste Incinerators, Large Municipal Waste Incinerators, Small Municipal Waste Incinerators, and Other Solid Waste Incinerators
The Environmental Protection Agency (EPA) is proposing to approve the negative declarations submitted by the Philadelphia Air Management Services (AMS) on January 13, 2026. The negative declarations submitted by AMS certify that there are no existing commercial and industrial solid waste incinerators (CISWI), large municipal waste combustors (LMWC), small municipal waste combustors (SMWC), or other solid waste incinerators (OSWI) subject to the Clean Air Act (CAA) requirements within the jurisdiction of the City of Philadelphia.
Comments close Sep 28, 2026Docket EPA-R03-OAR-2026-2377, FRL-13383-01-R3FR Doc. 2026-17488
- Proposed rulePublished Aug 27, 202640 CFR 62Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; Puerto Rico; Negative Declaration for the Oil and Gas Industry
Pursuant to the Clean Air Act, the Environmental Protection Agency is proposing to approve a negative declaration for oil and natural gas facilities within the Commonwealth of Puerto Rico. This negative declaration formally certifies that there are no existing crude oil or natural gas facilities in the jurisdiction of Puerto Rico that must comply with the Emission Guidelines for Greenhouse Gas Emissions from Existing Crude Oil and Natural Gas Facilities.
Comments close Sep 28, 2026Docket EPA-R02-OAR-2026-2741, FRL-13326-01-R2FR Doc. 2026-17495
- Proposed rulePublished Aug 24, 202640 CFR 81Response to Clean Air Act Section 176A Petition From New Hampshire
Docket EPA-HQ-OAR-2026-2179, FRL-13567-01-R1FR Doc. C1-2026-16331
- Final rulePublished Aug 20, 202640 CFR 52Air Plan Approval; Arizona; Attainment Plan for the Hayden SO2 Nonattainment Area for the 1971 and 2010 Sulfur Dioxide National Ambient Air Quality Standards
The Environmental Protection Agency (EPA) is finalizing approval of revisions to the Arizona state implementation plan (SIP) for attaining the 1971 and 2010 sulfur dioxide (SO<INF>2</INF>) national ambient air quality standards (NAAQS or "standards") in the Hayden SO<INF>2</INF> nonattainment area. These SIP revisions, collectively referred to as the "Hayden SO<INF>2</INF> Plan" or "Plan," include Arizona's attainment demonstration and other elements required under Clean Air Act (CAA or "Act") sections 110, 172, 191, and 192. In addition to an attainment demonstration, the revisions address th
Effective Sep 21, 2026Docket EPA-R09-OAR-2025-3821, FRL-13144-02-R9FR Doc. 2026-16989
- Final rulePublished Aug 20, 202640 CFR 52Air Plan Approval; SC; Department Name Change
The U.S. Environmental Protection Agency (EPA or Agency) is approving a State Implementation Plan (SIP) revision submitted by the State of South Carolina on July 23, 2025. The revision updates references to reflect the restructuring of South Carolina Department of Health and Environmental Control (DHEC) to the South Carolina Department of Public Health and the South Carolina Department of Environmental Services (DES).
Effective Sep 21, 2026Docket EPA-R04-OAR-2025-3625, FRL-13296-02-R4FR Doc. 2026-16990
- Final rulePublished Aug 20, 202640 CFR 52Air Plan Approval; Wisconsin; Moderate Attainment Plan Elements for Wisconsin's 2015 Ozone Standard Areas
The U.S. Environmental Protection Agency (EPA) is approving portions of Wisconsin's 2015 ozone National Ambient Air Quality Standard (NAAQS or standard) Moderate nonattainment area State Implementation Plan (SIP) submission for the Wisconsin portion of the Chicago, Illinois-Indiana-Wisconsin area (Kenosha County), the Milwaukee, Wisconsin area, and the Sheboygan County, Wisconsin area. The elements of the Moderate SIP submissions include the reasonable further progress (RFP) demonstration and the associated motor vehicle emissions budgets (Budgets) for 2023, the motor vehicle inspection and ma
Effective Sep 21, 2026Docket EPA-R05-OAR-2025-0169, EPA-R05-OAR-2025-0170, EPA-R05-OAR-2025-0171FR Doc. 2026-16986
- Proposed rulePublished Aug 19, 202640 CFR 52Air Plan Approval; South Carolina; Minor Source Permit Program Revisions
The U.S. Environmental Protection Agency (EPA or Agency) is proposing to approve changes to South Carolina's State Implementation Plan (SIP) to revise regulations prescribing minor source permit program requirements, including minor new source review (NSR) requirements, in SIP revisions submitted by the State of South Carolina on October 1, 2007, July 18, 2011, August 8, 2014, April 24, 2020, and July 23, 2025. This action is being proposed pursuant to the Clean Air Act (CAA or Act).
Comments close Sep 18, 2026Docket EPA-R04-OAR-2024-0241, FRL-12545-03-R4FR Doc. 2026-16937
- Proposed rulePublished Aug 19, 202640 CFR 52Air Plan Approval; South Carolina; Minor Source Permit Program Revisions
The U.S. Environmental Protection Agency (EPA or Agency) is proposing action on changes to South Carolina's State Implementation Plan (SIP) to revise regulations prescribing minor source permitting program requirements, including minor new source review (NSR) requirements, involving, in part, minor source permitting public participation, in SIP revisions submitted by the State of South Carolina through the South Carolina Department of Health and Environmental Control (SC DHEC) on October 1, 2007; July 18, 2011; August 8, 2014; July 27, 2016; and April 24, 2020. This proposal supplements previo
Comments close Sep 18, 2026Docket EPA-R04-OAR-2024-0241, FRL-13590-01-R4FR Doc. 2026-16930
- Proposed rulePublished Aug 19, 202640 CFR 52Air Plan Partial Approval and Partial Conditional Approval; South Carolina; Control of Oxides of Nitrogen and Source Testing Requirements
The U.S. Environmental Protection Agency (EPA or Agency) is proposing to partially approve and partially conditionally approve changes to South Carolina's State Implementation Plan (SIP) to revise source testing requirements and regulations prescribing control requirements for certain stationary sources of nitrogen oxides (NO<INF>X</INF>) submitted by the State of South Carolina, through the South Carolina Department of Environmental Services (SC DES), on October 1, 2007; July 27, 2016; September 5, 2017; April 24, 2020; and February 4, 2022. This action is being proposed pursuant to the Clean
Comments close Sep 18, 2026Docket EPA-R04-OAR-2025-0017, FRL-13063-01-R4FR Doc. 2026-16932
- Final rulePublished Aug 14, 202640 CFR 52Approval of Source-Specific Air Quality Implementation Plan; New York; Big Six Towers Inc.
The Environmental Protection Agency (EPA) is approving a revision to the State of New York's State Implementation Plan (SIP) for the ozone National Ambient Air Quality Standard (NAAQS) related to a source-specific SIP (SSSIP) revision for Big Six Towers Inc. (the Big Six), located at 59-55 47th Ave. Woodside, NY 11377 (the Facility). The EPA found that the control options in this SSSIP revision implement Reasonably Available Control Technology (RACT) with respect to oxides of nitrogen (NO<INF>X</INF>) emissions from the relevant Facility sources, which are identified as three oil-fired engines
Effective Sep 14, 2026Docket EPA-R02-OAR-2025-3588, FRL-13122-02-R2FR Doc. 2026-16627
- Proposed rulePublished Aug 11, 202640 CFR 81Response to Clean Air Act Section 176A Petition From New Hampshire
The Environmental Protection Agency (EPA) is proposing to grant a Clean Air Act (CAA or Act) petition submitted by the state of New Hampshire on December 24, 2025. The petition requests that the EPA remove the State of New Hampshire from the Ozone Transport Region (OTR) based on New Hampshire's continued attainment of the ozone National Ambient Air Quality Standards (NAAQS) and technical analyses demonstrating that the additional control of emissions from the state will not significantly contribute to ozone attainment in any area in the OTR. The OTR was established by the 1990 Clean Air Act Am
Comments close Sep 25, 2026Docket EPA-HQ-OAR-2026-2179, FRL-13567-01-R1FR Doc. 2026-16331
- Proposed rulePublished Jul 30, 202640 CFR 5240 CFR 81Air Plan Approval; Pennsylvania; Redesignation of the Warren County Nonattainment Area to Attainment and Approval of the Area's Maintenance Plan for the 2010 1-Hour Primary Sulfur Dioxide National Ambient Air Quality Standard
The Environmental Protection Agency (EPA) is proposing to approve a state implementation plan (SIP) revision and redesignation request submitted on September 19, 2025 by the Pennsylvania Department of Environmental Protection (PADEP). The SIP revision asks the EPA to redesignate the Warren County, Pennsylvania area from nonattainment to attainment for the 2010 1-hour primary sulfur dioxide (SO<INF>2</INF>) national ambient air quality standard (NAAQS). The revision also asks the EPA to approve into the SIP the Commonwealth's maintenance plan for the 2010 1-hour primary SO<INF>2</INF> NAAQS for
Comments close Aug 31, 2026Docket EPA-R03-OAR-2026-1685, FRL-13024-01-R3FR Doc. 2026-15372
- Proposed rulePublished Jul 30, 202640 CFR 70Clean Air Act Operating Permit Program Revisions; California; Amador County Air Pollution Control District, Calaveras County Air Pollution Control District, Great Basin Unified Air Pollution Control District, Northern Sierra Air Quality Management District
The Environmental Protection Agency (EPA) is proposing to approve revisions to four State of California air districts' Clean Air Act title V program rules to remove emergency affirmative defense provisions. The four districts are the Amador County Air Pollution Control District (ACAPCD), the Calaveras County Air Pollution Control District (CCAPCD), the Great Basin Unified Air Pollution Control District (GBUAPCD), and the Northern Sierra Air Quality Management District (NSAQMD) ("Districts"). This proposed action is being taken in accordance with Federal regulations and the Clean Air Act (CAA o
Comments close Aug 31, 2026Docket EPA-R09-OAR-2025-0166, FRL-12718-01-R9FR Doc. 2026-15362
- Final rulePublished Jul 30, 202640 CFR 70Operating Permit Program Approval; New Hampshire; Revised Definitions
The Environmental Protection Agency (EPA) approves revisions to the State of New Hampshire's Clean Air Act (CAA) title V operating permit program. These revisions amend the definitions of "hazardous air pollutant" and "regulated air pollutant" in New Hampshire regulations to remain consistent with Federal permitting and air toxics requirements in accordance with the CAA.
Effective Aug 31, 2026Docket EPA-R01-OAR-2025-1608, FRL-13018-02-R1FR Doc. 2026-15363
- Proposed rulePublished Jul 28, 202640 CFR 5240 CFR 81Air Plan Approval; Michigan; Redesignation of the Berrien, MI and Muskegon, MI Areas to Attainment of the 2015 Ozone Standards
The Environmental Protection Agency (EPA) is proposing to approve the Michigan Department of Environment, Great Lakes, and Energy's (EGLE's) December 26, 2025, requests to redesignate the Berrien and Muskegon areas to attainment for the 2015 ozone NAAQS because the requests meet the statutory requirements for redesignation under the Clean Air Act (CAA). The Berrien area includes Berrien County, and the Muskegon area includes the western portion of Muskegon County. The EPA is proposing to approve, as revisions to the Michigan State Implementation Plan (SIP), the State's plans for maintaining th
Comments close Aug 27, 2026Docket EPA-R05-OAR-2025-4116, EPA-R05-OAR-2025-4117, FRL-13661-01-R5FR Doc. 2026-15167
- Proposed rulePublished Jul 28, 202640 CFR 5240 CFR 81Air Plan Approval; Michigan; Redesignation of the Detroit, MI Area to Attainment of the 2015 Ozone Standards
The Environmental Protection Agency (EPA) is proposing to approve a request from the Michigan Department of Environment, Great Lakes, and Energy (EGLE) to redesignate the Detroit, Michigan area to attainment for the 2015 ozone National Ambient Air Quality Standards (NAAQS) because the request meets the statutory requirements for redesignation under the Clean Air Act (CAA). EGLE submitted this request on January 3, 2022, and submitted a supplement to this request on May 18, 2026. The EPA is also proposing to approve, as a revision to the Michigan State Implementation Plan (SIP), the State's upd
Comments close Aug 27, 2026Docket EPA-R05-OAR-2022-0004, FRL-13415-01-R5FR Doc. 2026-15168
- Final rulePublished Jul 23, 202640 CFR 70Air Plan Approval; Maine; Chapter 140: Part 70 Air Emission License Regulation
The Environmental Protection Agency (EPA) is approving a Clean Air Act (CAA) operating permit program revision submitted by the State of Maine. This revision makes minor changes to Maine's operating permit program that are considered clarifications, that correct grammar, that codify longstanding practices, or that are necessary for the state to utilize an expected future electronic application system. The revisions also include provisions allowing the public comment period on a draft permit to run concurrently with the EPA's review of a proposed permit. The intended effect of this action is to
Effective Aug 24, 2026Docket EPA-R01-OAR-2025-0282, FRL-13016-02-R1FR Doc. 2026-14885
- Final rulePublished Jul 16, 202640 CFR 5240 CFR 81Air Plan Approval and Air Quality Designation; Ohio; Attainment Plan and Redesignation of the Canton Area to Attainment of the 2008 Lead Standard
The U.S. Environmental Protection Agency (EPA or Agency) is approving the attainment plan and comprehensive emissions inventory for the Canton Nonattainment Area for the 2008 Lead (Pb) National Ambient Air Quality Standards (NAAQS) submitted by the Ohio Environmental Protection Agency (Ohio EPA or Ohio) on September 19, 2024. Additionally, the EPA is determining that the Canton Nonattainment Area has attained the 2008 Pb NAAQS and is approving Ohio's April 25, 2025, maintenance plan for continued attainment. With these approvals, the EPA is acting in accordance with Ohio's request to redesigna
Effective Jul 16, 2026Docket EPA-R05-OAR-2024-0461, EPA-R05-OAR-2025-0222, FRL-13226-02-R5FR Doc. 2026-14318
- Final rulePublished Jul 16, 202640 CFR 5240 CFR 70Air Plan Approval; Iowa; Revisions to Iowa Air Quality Regulations
The Environmental Protection Agency (EPA) is taking final action to approve revisions to the Iowa State Implementation Plan (SIP) and the Operating Permit Program to incorporate recent changes to the Iowa Administrative Code (IAC). The revisions include removal of the Voluntary Operating Permit (VOP) Program language; removal of the Emission Reduction Program language; new and renumbered rules; replacement of duplicative language with references to state statute and federal regulations; updated definitions; consolidation of 14 chapters into 8 chapters; and minor clarifications to language and
Effective Aug 17, 2026Docket EPA-R07-OAR-2026-1156, FRL-13242-02-R7FR Doc. 2026-14322
- Final rulePublished Jul 16, 202640 CFR 62Approval and Promulgation of State Plan (Negative Declaration) for Designated Facilities and Pollutants; Nebraska; Commercial and Industrial Solid Waste Incineration Units
The Environmental Protection Agency (EPA) is taking direct final action to accept a negative declaration submitted by the Nebraska Department of Water, Energy, and Environment (NDWEE) to satisfy the emission guidelines and associated compliance times requirements for Commercial and Industrial Solid Waste Incineration (CISWI) units for the State of Nebraska. The negative declaration certifies that there are no existing sources within the jurisdiction of Nebraska that must comply with the rule. This action is being taken in accordance with the Clean Air Act (CAA) requirements for emission guidel
Effective Sep 14, 2026Comments close Aug 17, 2026Docket EPA-R07-OAR-2026-4952, FRL-13457-02-R7FR Doc. 2026-14330
- Proposed rulePublished Jul 16, 202640 CFR 62Approval and Promulgation of State Plan (Negative Declaration) for Designated Facilities and Pollutants; Nebraska; Commercial and Industrial Solid Waste Incineration Units
The Environmental Protection Agency (EPA) is proposing to accept a negative declaration submitted by the Nebraska Department of Water, Energy, and Environment (NDWEE) to satisfy the emission guidelines and associated compliance times requirements for Commercial and Industrial Solid Waste Incineration (CISWI) units for the State of Nebraska. The negative declaration certifies that there are no existing sources within the jurisdiction of Nebraska that must comply with the rule. This action is being taken in accordance with the Clean Air Act (CAA) requirements for emission guidelines and state pl
Comments close Aug 17, 2026Docket EPA-R07-OAR-2026-4952, FRL-13457-01-R7FR Doc. 2026-14329
- Final rulePublished Jul 16, 202640 CFR 60New Source Performance Standards Review for Stationary Combustion Turbines and Stationary Gas Turbines; Correction
The U.S. Environmental Protection Agency (EPA) is making corrections to the New Source Performance Standards Review for Stationary Combustion Turbines and Stationary Gas Turbines final rule ("Final NSPS Rule") that published in the Federal Register (FR) on January 15, 2026, and became effective on January 15, 2026. After publication, the EPA identified inadvertent technical and typographical errors in the Federal Register regulatory text and is correcting those errors.
Effective Aug 17, 2026Docket EPA-HQ-OAR-2024-0419, FRL-11542.1-02-OARFR Doc. 2026-14371
- Final rulePublished Jul 9, 202640 CFR 5240 CFR 81Air Plan Approval; Michigan; Redesignation and Maintenance Plan for the Partial St. Clair 2010 1-Hour Sulfur Dioxide (SO2) NAAQS Nonattainment Area
The Environmental Protection Agency (EPA) is taking final action to redesignate the St. Clair nonattainment area in southeast Michigan to attainment for the 2010 sulfur dioxide (SO<INF>2</INF>) National Ambient Air Quality Standard (NAAQS). The EPA is also approving Michigan's maintenance plan for the St. Clair SO<INF>2</INF> nonattainment area and emissions limits for the DTE Belle River Power Plant. Michigan submitted the request for approval of the St. Clair area redesignation and maintenance plan on December 14, 2023, with a supplement to the request on July 24, 2025. The EPA proposed to a
Effective Jul 9, 2026Docket EPA-R05-OAR-2023-0635, FRL-13222-02-R5FR Doc. 2026-13843
- Proposed rulePublished Jul 7, 202640 CFR 51Minor New Source Review Program Air Permitting Public Participation Requirements for State Implementation Plans
The U.S. Environmental Protection Agency (EPA) is proposing to revise the public participation regulatory requirements for sources subject to Clean Air Act (CAA) New Source Review (NSR) programs approved into State Implementation Plans (SIPs). Specifically, the EPA is proposing to recognize in regulation that State and local air quality regulatory authorities ("air agencies") determine, pursuant to the CAA, whether, when, and to what extent public participation in minor NSR programs is necessary to assure the National Ambient Air Quality Standards (NAAQS) are achieved. If finalized, the change
Comments close Aug 21, 2026Docket EPA-HQ-OAR-2025-1212, FRL-9632-03-OARFR Doc. 2026-13667
- Final rulePublished Jul 6, 202640 CFR 63National Emission Standards for Hazardous Air Pollutants: Plywood and Composite Wood Products
The U.S. Environmental Protection Agency (EPA) is finalizing amendments to the national emissions standards for hazardous air pollutants (NESHAP) for the Plywood and Composite Wood Products (PCWP) source category. Specifically, the EPA is finalizing maximum achievable control technology (MACT) standards in the form of emission limitations and work practices as appropriate for total hazardous air pollutants (HAP) (including acetaldehyde, acrolein, formaldehyde, methanol, phenol, propionaldehyde), non-mercury (non-Hg) HAP metals, mercury (Hg), hydrogen chloride (HCl), polycyclic aromatic hydroca
Effective Jul 6, 2026Docket EPA-HQ-OAR-2016-0243, FRL-5185.1-02-OARFR Doc. 2026-13550
- Proposed rulePublished Jul 2, 202640 CFR 62Federal Plan Requirements for Other Solid Waste Incineration Units That Commenced Construction on or Before August 31, 2020, and Have Not Been Modified or Reconstructed After August 29, 2025
The U.S. Environmental Protection Agency (EPA) is proposing a Federal plan to implement the revised emission guidelines for existing other solid waste incineration (OSWI) units. The EPA promulgated emission guidelines for existing OSWI units in 2005 and revised the emission guidelines on June 30, 2025. If a State or Tribe with existing OSWI units subject to the 2025 revised OSWI emission guidelines does not submit an approvable plan by June 30, 2027, the EPA will develop, implement, and enforce a Federal plan for existing OSWI units located in that State or area of Indian Country. This action
Comments close Aug 17, 2026Docket EPA-HQ-OAR-2025-3028, FRL-12944-02-OARFR Doc. 2026-13485
- Final rulePublished Jun 29, 202640 CFR 5240 CFR 81Air Plan Approval; Ohio; Redesignation of the Cleveland, OH Area to Attainment of the 2015 Ozone Standard
The Environmental Protection Agency (EPA) is approving the request from the Ohio Environmental Protection Agency (Ohio EPA) to redesignate the Cleveland, Ohio area to attainment for the 2015 ozone National Ambient Air Quality Standards (NAAQS) because the request meets the statutory requirements for redesignation under the Clean Air Act (CAA). Ohio EPA submitted this request on December 8, 2025. The EPA is approving, as a revision to the Ohio State Implementation Plan (SIP), the State's plan for maintaining the 2015 ozone NAAQS through 2038 in the Cleveland area. The EPA is also finding adequa
Effective Jun 29, 2026Docket EPA-R05-OAR-2025-3654, FRL-13297-02-R5FR Doc. 2026-13027
- Final rulePublished Jun 26, 202640 CFR 62Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; Louisiana; Control of Emissions From Existing Other Solid Waste Incineration Units
Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is notifying the public that we have received a CAA section 111(d)/129 negative declaration from Louisiana for existing incinerators subject to the Other Solid Waste Incineration units (OSWI) Emission Guidelines (EG). This negative declaration certifies that existing incinerators subject to the OSWI EG and the requirements of sections 111(d) and 129 of the CAA do not exist within specified jurisdictions in Louisiana. The EPA is accepting the negative declaration and amending the agency regulations
Effective Jul 27, 2026Docket EPA-R06-OAR-2026-0233, FRL-13256-02-R6FR Doc. 2026-12895
- Final rulePublished Jun 26, 202640 CFR 62Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; Oklahoma; Control of Emissions From Existing Other Solid Waste Incineration Units, Hospital/Medical/Infectious Waste Incinerator Units, and Commercial and Industrial Solid Waste Incineration Units
Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is notifying the public that we have received CAA section 111(d)/129 negative declarations from Oklahoma for existing incinerators subject to the Other Solid Waste Incineration units (OSWI), Hospital/Medical/Infectious Waste Incinerator units (HMIWI), and Commercial and Industrial Solid Waste Incineration Units (CISWI) Emission Guidelines (EG). These negative declarations certify that existing incinerators subject to the OSWI, HMIWI, and CISWI EG and the requirements of sections 111(d) and 129 of
Effective Jul 27, 2026Docket EPA-R06-OAR-2020-0610, FRL-12763-02-R6FR Doc. 2026-12896
- Final rulePublished Jun 22, 202640 CFR 63Congressional Review Act Revocation of 2024 Amendments to the National Emission Standards for Hazardous Air Pollutants: Rubber Tire Manufacturing
The U.S. Environmental Protection Agency (EPA) is amending the Code of Federal Regulations (CFR) to remove the provisions finalized by the EPA in a 2024 final rule titled "National Emission Standards for Hazardous Air Pollutants: Rubber Tire Manufacturing" ("2024 Rubber Tire Rule"). Under the Congressional Review Act (CRA), Congress passed, and the President signed, a joint resolution of disapproval of the 2024 Rubber Tire Rule. The 2024 Rubber Tire Rule promulgated first- time air emissions standards for the rubber processing subcategory of the rubber tire manufacturing source category. Under
Effective Nov 29, 2024Docket EPA-HQ-OAR-2023-0392, FRL-5949.2-03-OARFR Doc. 2026-12424
- Proposed rulePublished Jun 22, 202640 CFR 63National Emission Standards for Hazardous Air Pollutants: National Emission Standards for Hazardous Air Pollutants: Crude Oil and Natural Gas Production Facilities and Natural Gas Transmission and Storage Facilities; Technology Review and Reconsideration; Extension of Comment Period
On April 22, 2026, the U.S. Environmental Protection Agency (EPA) proposed a rule titled "National Emission Standards for Hazardous Air Pollutants: Crude Oil and Natural Gas Production Facilities and Natural Gas Transmission and Storage Facilities; Technology Review and Reconsideration." The EPA is extending the comment period on this proposed rule, which is scheduled to close on June 22, 2026. The comment period will now end on August 6, 2026, to allow additional time for stakeholders to review and comment on the proposal.
Effective Apr 22, 2026Comments close Aug 6, 2026Docket EPA-HQ-OAR-2025-1348, FRL-5732-04-OARFR Doc. 2026-12481
- Proposed rulePublished Jun 12, 202640 CFR 51Ozone Reclassification State Implementation Plan Rule
The U.S. Environmental Protection Agency (EPA) is reconsidering certain aspects of the January 2025 final rule entitled State Implementation Plan Submittal Deadlines and Implementation Requirements for Reclassified Nonattainment Areas Under the Ozone National Ambient Air Quality Standards ("January 2025 final rule"). Among other things, the January 2025 final rule codified a policy that certain State Implementation Plan (SIP) requirements for a prior classification remain due upon an area's reclassification to a higher classification. In this proposed action, the EPA is proposing a new interpr
Comments close Jul 13, 2026Docket EPA-HQ-OAR-2025-0201, FRL-11817.1-01-OARFR Doc. 2026-11843
- Final rulePublished Jun 5, 202640 CFR 98Extending the Reporting Deadline Under the Greenhouse Gas Reporting Rule for 2025; Correction
The Environmental Protection Agency (EPA) is correcting the preamble of a final rule published in the Federal Register on February 27, 2026. The final rule extended the reporting deadline under the Greenhouse Gas Reporting Rule, commonly referred to as the Greenhouse Gas Reporting Program (GHGRP), for reporting year 2025 from March 31, 2026, to October 30, 2026. This document corrects an inadvertent typographical error in the Federal Register. This correction does not result in any substantive changes to the final rule.
Effective Jun 5, 2026Docket EPA-HQ-OAR-2025-0186, FRL 12720.1-03-OARFR Doc. 2026-11360
- Final rulePublished Jun 4, 202640 CFR 70Clean Air Act Title V Operating Permit Program Revision; District of Columbia
The Environmental Protection Agency (EPA) is approving a revision to the District of Columbia (DC, the District's) title V operating permits program, submitted on behalf of the District by the Department of Energy and Environment (DOEE). The revision will update the title V operating permit fees collected by DOEE in order to ensure that the title V operating program will continue to be adequately funded. The revision also reorganized some sections in Chapter 3 of 20 District of Columbia Municipal Regulations (20 DCMR) with no substantive change in content. The EPA is approving these revisions
Effective Jul 6, 2026Docket EPA-R03-OAR-2025-1614, FRL-13044-02-R3FR Doc. 2026-11170
- Final rulePublished Jun 4, 202640 CFR 5240 CFR 81Revisions of the Nonattainment Designation for the 2008 and 2015 Ozone Standards and Clean Data Determinations for the 2008 and 2015 Ozone Standards: Cecil County, MD and New Castle County, DE
The Environmental Protection Agency (EPA) is approving two separate requests from Maryland and Delaware to revise the designation for the Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE nonattainment area for the 2008 primary and secondary ozone national ambient air quality standards (NAAQS) and the 2015 primary and secondary ozone NAAQS. Due to the concurrent requests from Maryland and Delaware, the EPA is revising the Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE nonattainment area boundary into three distinct nonattainment areas that together cover the identical geographic area of t
Effective Jul 6, 2026Docket EPA-R03-OAR-2025-1872, FRL-12994-02-R3FR Doc. 2026-11169
- Final rulePublished Jun 3, 202640 CFR 63National Emission Standards for Hazardous Air Pollutants From Hazardous Waste Combustors: Residual Risk and Technology Review
The U.S. Environmental Protection Agency (EPA) is finalizing the residual risk and technology review (RTR) conducted for the National Emission Standards for Hazardous Air Pollutants (NESHAP) from Hazardous Waste Combustors (HWC). Specifically, the EPA is finalizing that risks due to emissions of hazardous air pollutants (HAP) from this source category are adequately addressed by the existing standards; that the NESHAP provides an ample margin of safety to protect public health; and that no developments in practices, processes, or control technologies necessitate revision of the standards. In a
Effective Jun 3, 2026Docket EPA-HQ-OAR-2004-0022, FRL-10654-02-OARFR Doc. 2026-11047
- Final rulePublished Jun 1, 202640 CFR 7040 CFR 71Rescission of Title V Emergency Affirmative Defense Rule
The U.S. Environmental Protection Agency (EPA) is rescinding a 2023 final rule titled "Removal of Title V Emergency Affirmative Defense Provisions From State Operating Permit Programs and Federal Operating Permit Program" ("2023 Affirmative Defense Rule"). The 2023 Affirmative Defense Rule removed emergency-related affirmative defense provisions from Federal regulations governing title V operating permit programs. The EPA is taking this final action in response to a September 5, 2025, decision of the U.S. Court of Appeals for the District of Columbia (DC) Circuit which reversed the EPA's 2023
Effective Jun 1, 2026Docket EPA-HQ-OAR-2016-0186, FRL-8961.1-02-OARFR Doc. 2026-10875
- Final rulePublished May 29, 202640 CFR 62Approval and Promulgation of State Air Quality Plans (Negative Declarations) for Designated Facilities and Pollutants; District of Columbia
The Environmental Protection Agency (EPA) is providing notice of and is codifying approval of negative declarations submitted by the District of Columbia Department of Energy and Environment (DCDOEE) on July 19, 2024 and August 28, 2024. The negative declarations submitted by the DCDOEE certify that there are no existing large municipal waste combustors (LMWC), crude oil and natural gas facilities (ONG), or electric utility generating units (EGU) subject to sections 111(d) and 129 of the Clean Air Act (CAA) within the jurisdiction of the District of Columbia.
Effective Jun 29, 2026Docket EPA-R03-OAR-2025-1746, FRL-13006-02-R3FR Doc. 2026-10739
- Final rulePublished May 29, 202640 CFR 81Designation of Areas for Air Quality Planning Purposes; Michigan; Technical Amendment
The Detroit, Michigan area was redesignated to attainment of the 2015 ozone National Ambient Air Quality Standards (NAAQS) on May 19, 2023. On December 5, 2025, the United States Court of Appeals for the Sixth Circuit vacated the Environmental Protection Agency's (EPA's) redesignation of the Detroit area. Therefore, pursuant to the Court's decision, the EPA is making a technical amendment to the part 81 listing for the Detroit area to reflect the area's designation as nonattainment for the 2015 ozone NAAQS, with a classification of Moderate.
Effective Jun 29, 2026Docket EPA-R05-OAR-2022-0004, FRL-13336-01-R5FR Doc. 2026-10768
- Final rulePublished May 29, 202640 CFR 62South Carolina; Approval of State Plan for Control of Emissions From Commercial and Industrial Solid Waste Incineration Units
The Environmental Protection Agency (EPA) is taking final action to approve a state plan submitted by the State of South Carolina, through the South Carolina Department of Health and Environmental Control (SC DHEC) on December 19, 2014, and supplemented on September 17, 2018, June 19, 2019, and November 5, 2019, for implementing and enforcing the Emissions Guidelines (EG) applicable to existing Commercial and Industrial Solid Waste Incineration (CISWI) units. The State plan provides for implementation and enforcement of the EG, as finalized by EPA on June 23, 2016, applicable to existing CISWI
Effective Jun 29, 2026Docket EPA-R04-OAR-2021-0258, FRL-9562-02-R4FR Doc. 2026-10744
- Final rulePublished May 14, 202640 CFR 62Approval and Promulgation of Delegation of Authority for Designated Facilities and Pollutants; Washington; Northwest Clean Air Agency
The Environmental Protection Agency (EPA) is approving delegation of authority to the Northwest Clean Air Agency (NWCAA) for implementing and enforcing the Federal plan requirements for sewage sludge incineration (SSI) units. The Federal plan addresses the implementation and enforcement of emission limits and other control requirements for designated air pollutants. On December 11, 2018, the EPA Region 10 Regional Administrator and the Executive Director of NWCAA signed a Memorandum of Agreement (MOA) concerning delegation of authority of the Federal plan to NWCAA, which became effective upon
Effective May 14, 2026Docket EPA-R10-OAR-2026-0694, FRL-13223-01-R10FR Doc. 2026-09615
- Proposed rulePublished May 14, 202640 CFR 5240 CFR 81Determination of Attainment by the Attainment Date and Clean Data Determination for the 2012 Annual Fine Particulate Standard; Plumas County, California
The Environmental Protection Agency (EPA) is proposing to determine that the Portola nonattainment area in Plumas County, California, attained the 2012 annual fine particulate matter ("PM<INF>2.5</INF>") national ambient air quality standard (NAAQS or "standard") by the December 31, 2025 "Serious" area attainment date. This proposed determination is based on ambient air quality monitoring data from 2023 through 2025. We are also proposing to make a clean data determination (CDD) based on the 2023 through 2025 data. If we finalize this CDD, certain Clean Air Act (CAA) requirements that apply to
Comments close Jun 15, 2026Docket EPA-R09-OAR-2026-2608, FRL-13323-01-R9FR Doc. 2026-09604
- Proposed rulePublished May 13, 202640 CFR 4940 CFR 5140 CFR 52Begin Actual Construction in the New Source Review (NSR) Preconstruction Permitting Program
The U.S. Environmental Protection Agency (EPA) is proposing revisions to the New Source Review (NSR) air permitting regulations. These regulatory revisions would distinguish between construction of a stationary source and construction of non-emitting components or structures, while clarifying and codifying that the latter can occur before an owner or operator obtains an NSR air permit for a new major stationary source or major modification of an existing major stationary source. The revisions will update the definition of "begin actual construction" and add a definition of "pollutant-emitting
Comments close Jun 29, 2026Docket EPA-HQ-OAR-2025-0618, FRL-12757-01-OARFR Doc. 2026-09524
- Final rulePublished May 7, 202640 CFR 62Approval and Promulgation of Delegation of Authority for Designated Facilities and Pollutants; Allegheny County; Delegation of Authority of the Federal Plan for Existing Sewage Sludge Incineration Units
The Environmental Protection Agency (EPA) is codifying the approval of a request submitted by the Allegheny County Health Department (ACHD) for delegation of authority to implement and enforce the Federal plan for existing affected Sewage Sludge Incineration (SSI) units within Allegheny County in the Commonwealth of Pennsylvania. The Federal plan addresses the implementation and enforcement of the emission guidelines applicable to existing SSI units located in areas not covered by an approved and currently effective state plan. The Federal plan imposes emission limits and other control require
Effective Jun 8, 2026Docket EPA-R03-OAR-2025-0487, FRL-12943-02-R3FR Doc. 2026-09043
- Proposed rulePublished May 1, 202640 CFR 63National Emission Standards for Hazardous Air Pollutants: Ethylene Oxide Emissions Standards for Sterilization Facilities Residual Risk and Technology Review Reconsideration; Extension of Comment Period
On March 17, 2026, the U.S. Environmental Protection Agency (EPA) proposed a rule titled "National Emission Standards for Hazardous Air Pollutants: Ethylene Oxide Emissions Standards for Sterilization Facilities Residual Risk and Technology Review Reconsideration." The EPA is extending the comment period on this proposed rule, which is scheduled to close on May 1, 2026. The comment period will now end on May 15, 2026, to allow additional time for stakeholders to review and comment on the proposal.
Effective Mar 17, 2026Comments close May 15, 2026Docket EPA-HQ-OAR-2019-0178, FRL-7055.1-03-OARFR Doc. 2026-08518
- Proposed rulePublished Apr 30, 202640 CFR 5240 CFR 81Utah; Northern Wasatch Front; 2015 8-Hour Ozone National Ambient Air Quality Standards; Reconsideration and Repeal of Finding of Failure To Attain and Reclassification to a Serious Nonattainment Area; Determination of Attainment by the Moderate Attainment Date But for International Emissions
The U.S. Environmental Protection Agency (EPA) is proposing to repeal the December 9, 2024, final rule in which the Agency determined that the Northern Wasatch Front (NWF) nonattainment area (NAA) in Utah failed to attain the Clean Air Act (CAA) 2015 ozone National Ambient Air Quality Standards (NAAQS) by the August 3, 2024, Moderate area attainment date, and reclassified the area by operation of law to Serious nonattainment (the "December 2024 Final Rule"). The EPA is also proposing to determine that the NWF ozone NAA would have attained the 2015 ozone NAAQS by the Moderate area attainment da
Comments close Jun 1, 2026Docket EPA-R08-OAR-2024-0552, FRL-13198-01-R8FR Doc. 2026-08372
- Final rulePublished Apr 29, 202640 CFR 63Approval of Missouri's Request for Partial Program Delegation of Clean Air Act 112(r) Prevention of Accidental Release Program
The Environmental Protection Agency (EPA) is taking final action to approve the Missouri Department of Natural Resource's (MoDNR's) request for delegation of a partial Clean Air Act (CAA) Risk Management Program (RMP) for agricultural anhydrous ammonia facilities in the State of Missouri. The EPA retains authority for any anhydrous ammonia that does not meet the definition of agricultural anhydrous ammonia at these facilities, the RMP for all other regulated chemicals that may be present at these facilities, and for the RMP generally in Missouri for all other facilities.
Effective May 29, 2026Docket EPA-R07-OAR-2026-0497, FRL-13206-02-R7FR Doc. 2026-08348
- Final rulePublished Apr 23, 202640 CFR 81Finding of Failure To Attain and Reclassification of Tribal Portions of the Greater Connecticut Ozone Nonattainment Area as Serious for the 2015 Ozone National Ambient Air Quality Standards
The Environmental Protection Agency (EPA) is finalizing its finding that the tribal portions of the Greater Connecticut area (the Mashantucket Pequot Tribal Nation and the Mohegan Indian Tribe) did not attain the 2015 ozone National Ambient Air Quality Standards (NAAQS) by the attainment date and a reclassification of those portions of the area to Serious nonattainment for the 2015 ozone NAAQS. Additionally, the EPA is taking final action on an exceptional events request submitted by CT DEEP on July 1, 2024, and the EPA's July 22, 2024 concurrence and nonconcurrence with CT DEEP's request. Thi
Effective May 26, 2026Docket EPA-R01-OAR-2024-0325, FRL-13014-02-R1FR Doc. 2026-07889
- Proposed rulePublished Apr 23, 202640 CFR 62Kentucky; Approval and Promulgation of State Plan for Designated Facilities and Pollutants; Control of Emissions From Existing Municipal Solid Waste Landfills
The Environmental Protection Agency (EPA) is proposing to approve the Clean Air Act (CAA or Act) section 111(d) State Plan submitted by the Commonwealth of Kentucky (Commonwealth) through the Kentucky Energy and Environment Cabinet (Cabinet) via a letter dated June 11, 2024, for implementing and enforcing the Emissions Guidelines (EG) and Compliance Times applicable to existing municipal solid waste (MSW) landfills (hereinafter "State Plan" or "MSW Landfill State Plan"). The State Plan provides for implementation and enforcement of the EG, as finalized by EPA on August 29, 2016, applicable to
Comments close May 26, 2026Docket EPA-R04-OAR-2025-1180, FRL-12940-01-R4FR Doc. 2026-07894
- Proposed rulePublished Apr 23, 202640 CFR 5240 CFR 81Utah; Uinta Basin; 2015 8-Hour Ozone National Ambient Air Quality Standard; Reconsideration and Repeal of Finding of Failure To Attain and Reclassification to a Moderate Nonattainment Area; Extension of the Attainment Date and Determination of Attainment by the Marginal Attainment Date
The U.S. Environmental Protection Agency (EPA or Agency) is proposing to repeal the December 16, 2024 final rule in which we denied a request by the State of Utah (State) and the Ute Indian Tribe of the Uintah and Ouray Reservation (Ute Indian Tribe or Tribe) for an extension of the attainment date for the Uinta Basin (UB), Utah Marginal nonattainment area (NAA) under the 2015 ozone National Ambient Air Quality Standard (NAAQS), determined that the area failed to attain the Clean Air Act (CAA) 2015 ozone NAAQS by the applicable Marginal attainment date of August 3, 2022, and reclassified the a
Comments close May 26, 2026Docket EPA-R08-OAR-2024-0001, FRL-13312-01-R8FR Doc. 2026-07904
- Proposed rulePublished Apr 22, 202640 CFR 63National Emission Standards for Hazardous Air Pollutants: Crude Oil and Natural Gas Production Facilities and Natural Gas Transmission and Storage Facilities; Technology Review and Reconsideration
The U.S. Environmental Protection Agency (EPA) is proposing an action related to the National Emission Standards for Hazardous Air Pollutants (NESHAP) from Crude Oil and Natural Gas Production Facilities and from Natural Gas Transmission and Storage Facilities (Oil and Gas NESHAP) in connection with a technology review pursuant to Clean Air Act (CAA) section 112. Based on the EPA's review the Agency is not proposing any revision to the current standards in the NESHAP. With respect to unregulated pollutants, the EPA is proposing standards for methanol from regulated emission points at crude oil
Comments close Jun 22, 2026Docket EPA-HQ-OAR-2025-1348, FRL-5732-02-OARFR Doc. 2026-07800
- Final rulePublished Apr 16, 202640 CFR 63National Emission Standards for Hazardous Air Pollutants: Coal- and Oil-Fired Electric Utility Steam Generating Units: Final Repeal; Correction
The U.S. Environmental Protection Agency (EPA) is correcting a final rule that published in the Federal Register (FR) on February 24, 2026, and will become effective on April 27, 2026. The EPA finalized the repeal of specific amendments to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Coal- and Oil-Fired Electric Utility Steam Generating Units (EGUs), commonly referred to as the Mercury and Air Toxics Standards (MATS), that were promulgated on May 7, 2024 ("MATS NESHAP"). This action corrects inadvertent typographical errors and minor omitted text in the Federal Reg
Effective Apr 27, 2026Docket EPA-HQ-OAR-2018-0794, FRL-6716.4-03-OARFR Doc. 2026-07396
- Final rulePublished Apr 9, 202640 CFR 60Reconsideration of Standards of Performance for New, Reconstructed, and Modified Sources and Emissions Guidelines for Existing Sources: Oil and Natural Gas Sector Climate Review
The U.S. Environmental Protection Agency (EPA) is finalizing amendments to the New Source Performance Standards (NSPS) and Emission Guidelines (EG) for Existing Sources for the Crude Oil and Natural Gas Source Category in response to petitions for reconsideration of the March 8, 2024, final rule. Specifically, this action finalizes discrete technical changes to two aspects of the rules. First, this action finalizes discrete technical changes to the temporary flaring provisions for associated gas in certain situations. Second, this action finalizes discrete technical changes to the vent gas net
Effective Jun 8, 2026Docket EPA-HQ-OAR-2024-0358, FRL-12031-02-OARFR Doc. 2026-06808
- Proposed rulePublished Apr 2, 202640 CFR 70Clean Air Act Operating Permit Program Revision; California; Monterey Bay Air Resources District
The Environmental Protection Agency (EPA) is proposing to approve revisions to the Monterey Bay Air Resources District's (MBARD or "District") Title V Operating Permits Program. These revisions remove emergency affirmative defense provisions; align the rule with current title V requirements by removing permitting requirements for greenhouse gases; create procedures for electronic public noticing of permits in addition to newspaper noticing; and update formatting to match the MBARD's current rule format. This action is being taken in accordance with federal regulations and the Clean Air Act (CA
Comments close May 4, 2026Docket EPA-R09-OAR-2024-0596, FRL-12507-03-R9FR Doc. 2026-06443
- Final rulePublished Apr 1, 202640 CFR 63National Emission Standards for Hazardous Air Pollutants: Chemical Manufacturing Area Sources Technology Review
The Environmental Protection Agency (EPA) is finalizing amendments to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for the Chemical Manufacturing Area Source (CMAS) categories pursuant to a technology review under Clean Air Act (CAA) section 112(d)(6). Specifically, the EPA is finalizing new leak detection and repair (LDAR) requirements for equipment leaks and heat exchange systems in organic hazardous air pollutant (HAP) service. In addition, the EPA is taking final action to add standards for pressure relief devices (PRDs) and pressure vessels; require electronic rep
Effective Apr 1, 2026Docket EPA-HQ-OAR-2024-0303, FRL-7623-02-OARFR Doc. 2026-06304
- Final rulePublished Apr 1, 202640 CFR 6340 CFR 8040 CFR 1090Renewable Fuel Standard (RFS) Program: Standards for 2026 and 2027, Partial Waiver of 2025 Cellulosic Biofuel Volume Requirement, and Other Changes
Under the Clean Air Act (CAA), the U.S. Environmental Protection Agency (EPA) is required to determine the applicable volume requirements for the Renewable Fuel Standard (RFS) for years after those specified in the statute. The EPA is establishing the applicable volumes and percentage standards for 2026 and 2027 for cellulosic biofuel, biomass-based diesel (BBD), advanced biofuel, and total renewable fuel. The EPA is also partially waiving the 2025 cellulosic biofuel volume requirement and revising the associated percentage standard due to a shortfall in cellulosic biofuel production. Finally,
Effective Jun 15, 2026Docket EPA-HQ-OAR-2024-0505, FRL-11947-02-OARFR Doc. 2026-06275
- Proposed rulePublished Mar 26, 202640 CFR 5240 CFR 70Air Plan Approval; Iowa; Revisions to Iowa Air Quality Regulations
The Environmental Protection Agency (EPA) is proposing to approve revisions to the Iowa State Implementation Plan (SIP) and the Operating Permit Program to incorporate recent changes to the Iowa Administrative Code (IAC). The revisions include removal of the Voluntary Operating Permit Program language; removal of the Emission Reduction Program language; new and renumbered rules; replacement of duplicative language with references to state statute and federal regulations; updated definitions; consolidation of 14 chapters into 8 chapters; and minor clarifications to language and grammar. The EPA
Comments close Apr 27, 2026Docket EPA-R07-OAR-2026-1156, FRL-13242-01-R7FR Doc. 2026-05875
- Final rulePublished Mar 24, 202640 CFR 62Approval and Promulgation of Delegation of Authority for Designated Facilities and Pollutants; Washington; Southwest Clean Air Agency
The Environmental Protection Agency (EPA) is approving delegation of authority to the Southwest Clean Air Agency (SWCAA) for implementing and enforcing the Federal plan requirements for several categories of incineration units, specifically hospital/medical/ infectious waste incineration units, commercial and industrial solid waste incineration units, small municipal solid waste combustion units, and sewage sludge incineration units. The Federal plan addresses the implementation and enforcement of emission limits and other control requirements for designated air pollutants. On March 27, 2023,
Effective Mar 24, 2026Docket EPA-R10-OAR-2026-0365, FRL-13196-01-R10FR Doc. 2026-05712
- Proposed rulePublished Mar 23, 202640 CFR 62Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; Louisiana; Control of Emissions From Existing Other Solid Waste Incineration Units
Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is notifying the public that we have received a CAA section 111(d)/129 negative declaration from Louisiana for existing incinerators subject to the Other Solid Waste Incineration units (OSWI) Emission Guidelines (EG). This negative declaration certifies that existing incinerators subject to the OSWI EG and the requirements of sections 111(d) and 129 of the CAA do not exist within specified jurisdictions in Louisiana. The EPA is proposing to accept the negative declaration and amend the agency regu
Comments close Apr 22, 2026Docket EPA-R06-OAR-2026-0233, FRL-13256-01-R6FR Doc. 2026-05606
- Proposed rulePublished Mar 23, 202640 CFR 62Approval and Promulgation of State Plans for Designated Facilities and Pollutants; West Virginia; Control of Emissions From Existing Municipal Solid Waste Landfills
The Environmental Protection Agency (EPA) proposes to approve a revision to a Clean Air Act (CAA) section 111(d) plan (plan) submitted by the West Virginia Department of Environmental Protection (WVDEP). This revision updates the plan to include changes made to Emissions Guidelines and Compliance Times for municipal solid waste (MSW) landfills. This action is being taken under the Clean Air Act (CAA).
Comments close Apr 22, 2026Docket EPA-R03-OAR-2023-0230, FRL-9329-01-R3FR Doc. 2026-05637
- Proposed rulePublished Mar 20, 202640 CFR 6040 CFR 62Standards for Air Curtain Incinerators That Only Burn Wood Wastes, Yard Wastes and Clean Lumber; Provision for Commercial and Industrial Solid Waste Incineration Units: Temporary Use Incinerators and Air Curtain Incinerators Used in Disaster Recovery
The U.S. Environmental Protection Agency (EPA) is proposing two separate and distinct actions under Clean Air Act (CAA) section 129. In the first action, the EPA proposes to consolidate the existing provisions governing air curtain incinerators (ACI) that only burn wood wastes, yard wastes, and clean lumber into one new rule subpart. Specifically, we are proposing to consolidate the opacity limitations and associated monitoring, recordkeeping, and reporting requirements that currently exist across various subparts for CAA section 129 source categories: large municipal waste combustors (LMWC),
Comments close May 4, 2026Docket EPA-HQ-OAR-2025-0068, FRL-12906-03-OARFR Doc. 2026-05491
- Final rulePublished Mar 19, 202640 CFR 6040 CFR 62Commercial and Industrial Solid Waste Incineration Units: Temporary-Use Incinerators and Air Curtain Incinerators Used in Disaster Recovery; Rescission of Interim Final Rule
The U.S. Environmental Protection Agency (EPA) is rescinding the interim final rule (IFR) titled "Commercial and Industrial Solid Waste Incineration Units: Temporary-Use Incinerators and Air Curtain Incinerators Used in Disaster Recovery." The IFR added temporary-use provisions that excluded certain commercial and industrial solid waste incineration (CISWI) units from otherwise applicable requirements when used on a temporary basis to combust non-hazardous debris in specified emergency or disaster circumstances. The EPA is rescinding those provisions and intends to address the same subject mat
Effective Mar 19, 2026Docket EPA-HQ-OAR-2003-0119, FRL-12232-04-OARFR Doc. 2026-05395
- Proposed rulePublished Mar 19, 202640 CFR 63National Emission Standards for Marine Tank Vessel Loading Operations: Technology Review
Docket EPA-HQ-OAR-2025-0207, FRL-11626-01-OARFR Doc. C1-2026-04304
- Final rulePublished Mar 18, 202640 CFR 63National Emission Standards for Hazardous Air Pollutants: Polyether Polyols Production Industry Review
The U.S. Environmental Protection Agency (EPA) is finalizing amendments to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for the Polyether Polyols (PEPO) Production source category ("PEPO NESHAP") under Clean Air Act (CAA) section 112. Specifically, the EPA is finalizing certain ethylene oxide (EtO)- specific standards pursuant to CAA section 112(d)(6) rather than finalizing the proposed second residual risk review and corresponding amendments pursuant to CAA section 112(f)(2). In addition, the EPA is taking final action addressing certain issues raised in an administra
Effective Mar 18, 2026Docket EPA-HQ-OAR-2023-0282, FRL-10854-02-OARFR Doc. 2026-05261
- Proposed rulePublished Mar 17, 202640 CFR 63National Emission Standards for Hazardous Air Pollutants: Ethylene Oxide Emissions Standards for Sterilization Facilities Residual Risk and Technology Review Reconsideration
On April 5, 2024, the U.S. Environmental Protection Agency (EPA) published the National Emission Standards for Hazardous Air Pollutants (NESHAP): Ethylene Oxide Emissions Standards for Sterilization Facilities Residual Risk and Technology Review (2024 Final Rule). The 2024 Final Rule revised the Commercial Sterilization Facilities NESHAP based on a residual risk and technology review (RTR) pursuant to the Clean Air Act (CAA) sections. On March 12, 2025, the EPA announced that it was reconsidering the 2024 Final Rule. Based on its reconsideration of the RTR in the 2024 Final Rule, the EPA is pr
Comments close May 1, 2026Docket EPA-HQ-OAR-2019-0178, FRL-7055.1-01-OARFR Doc. 2026-05167
- Final rulePublished Mar 10, 202640 CFR 60Standards of Performance for New Stationary Sources and Emission Guidelines for Existing Sources: Large Municipal Waste Combustors Voluntary Remand Response and Five-Year Review
The U.S. Environmental Protection Agency (EPA) is finalizing new source performance standards (NSPS) and emission guidelines (EG) for the large municipal waste combustion (MWC) source category. This final rule responds to a voluntary remand of the preceding rule for this source category and announces the results of the non-discretionary review at five-year intervals required by Clean Air Act (CAA) section 129(a)(5), fulfilling the requirements of a consent decree for the source category. The final rule revises the remanded emission limits for cadmium, lead, particulate matter, polychlorinated
Effective May 11, 2026Docket EPA-HQ-OAR-2017-0183, FRL-5120-04-OARFR Doc. 2026-04646
- Proposed rulePublished Mar 4, 202640 CFR 62Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; Texas; Control of Emissions From Existing Municipal Solid Waste Landfills
Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is proposing to approve the CAA section 111(d) state plan submitted by the State of Texas for sources subject to the Municipal Solid Waste (MSW) Landfills Emission Guidelines (EG). The Texas MSW landfills plan was submitted to fulfill the state's obligations under CAA section 111(d) to implement and enforce the requirements under the MSW Landfills EG. The EPA is proposing to approve the state plan and amend the agency regulations in accordance with the requirements of the CAA.
Comments close Apr 3, 2026Docket EPA-R06-OAR-2023-0478, FRL-12671-01-R6FR Doc. 2026-04338
- Proposed rulePublished Mar 4, 202640 CFR 63National Emission Standards for Marine Tank Vessel Loading Operations: Technology Review
The U.S. Environmental Protection Agency (EPA) is proposing amendments to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for the marine tank vessel loading operations (MTVLO) source category under Clean Air Act (CAA) section 112. The EPA is proposing certain decisions resulting from the Agency's technology review of the MTVLO NESHAP pursuant to CAA section 112(d)(6). Specifically, the EPA is proposing enhanced flare monitoring requirements, requirements to perform periodic performance testing, electronic reporting provisions, and removal of startup, shutdown, and malfunc
Comments close Apr 20, 2026Docket EPA-HQ-OAR-2025-0207, FRL-11626-01-OARFR Doc. 2026-04304
- Final rulePublished Feb 27, 202640 CFR 98Extending the Reporting Deadline Under the Greenhouse Gas Reporting Rule for 2025
The U.S. Environmental Protection Agency (EPA) is promulgating this final rule to extend the reporting deadline under the Greenhouse Gas Reporting Rule for reporting year 2025 from March 31, 2026 to October 30, 2026. This final rule changes only the reporting deadline for annual greenhouse gas (GHG) reports for reporting year 2025 in response to comments received on the proposed rescission of the Greenhouse Gas Reporting Program (GHGRP). The EPA anticipates addressing the remainder of the proposed rule in one or more subsequent final actions.
Effective Feb 27, 2026Docket EPA-HQ-OAR-2025-0186, FRL-12720.1-02-OARFR Doc. 2026-03995
- Final rulePublished Feb 26, 202640 CFR 5240 CFR 70Air Plan Approval; Missouri; Reporting Emission Data, Emission Fees, and Process Information
The Environmental Protection Agency (EPA) is taking final action to approve revisions to the Missouri State Implementation Plan (SIP) and the Missouri Operating Permits Program related to Reporting Emission Data, Emission Fees, and Process Information. The revisions set emission fees and a base fee for calendar years 2025-2028 and beyond, add 1-Bromopropane to the category 1 Hazardous Air Pollutant list in table 1, update two publication dates for material that is incorporated by reference and make minor administrative changes to the rule. These revisions do not impact the stringency of the SI
Effective Mar 30, 2026Docket EPA-R07-OAR-2025-2830, FRL-13059-02-R7FR Doc. 2026-03888
- Proposed rulePublished Feb 26, 202640 CFR 63Approval of Missouri's Request for Partial Program Delegation of Clean Air Act Section 112(r) Prevention of Accidental Release Program
Under the Clean Air Act (CAA), EPA may approve State or local rules or programs to be implemented and enforced in place of certain otherwise applicable Federal rules, emissions standards, or requirements. On October 6, 2025, the Missouri Department of Natural Resources (MoDNR), on behalf of the State of Missouri, requested delegation of a partial CAA Risk Management Program (RMP) for agricultural anhydrous ammonia facilities. The request was supplemented by MoDNR on October 9, 2025, and on October 27, 2025. The EPA has determined that MoDNR's request meets CAA requirements for delegation of a
Comments close Mar 30, 2026Docket EPA-R07-OAR-2026-0497, FRL-13206-01-R7FR Doc. 2026-03891
- Final rulePublished Feb 24, 202640 CFR 63National Emission Standards for Hazardous Air Pollutants: Coal- and Oil-Fired Electric Utility Steam Generating Units: Final Repeal
The U.S. Environmental Protection Agency (EPA) is finalizing the repeal of specific amendments to the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Coal- and Oil-Fired Electric Utility Steam Generating Units (EGUs), commonly referred to as the Mercury and Air Toxics Standards (MATS), that were promulgated on May 7, 2024. Specifically, the EPA is repealing the revised filterable particulate matter (fPM) emission standard, which serves as a surrogate for non-mercury hazardous air pollutant (HAP) metals for existing coal- fired EGUs; the revised fPM emission standard compl
Effective Apr 27, 2026Docket EPA-HQ-OAR-2018-0794, FRL-6716.4-02-OARFR Doc. 2026-03638
- Proposed rulePublished Feb 12, 202640 CFR 62Partial Approval and Promulgation of State Plan for Designated Facilities and Pollutants; West Virginia; Control of Emissions From Existing Commercial and Industrial Solid Waste Incineration (CISWI) Units, Plan Revision
The Environmental Protection Agency (EPA) is proposing to partially approve revisions to the state plan for designated facilities and pollutants applicable to existing Commercial and Industrial Solid Waste Incineration (CISWI) units in the State of West Virginia ("West Virginia"). This proposed action will partially approve West Virginia's revisions to its state plan to include rules implementing the EPA's amended emission guidelines for CISWI units developed under sections 111(d) and 129 of the Clean Air Act (CAA). The EPA is proposing to approve the state plan in part and to amend the agency
Comments close Mar 16, 2026Docket EPA-R03-OAR-2025-0043, FRL-11453-01-R3FR Doc. 2026-02830
- Final rulePublished Jan 15, 202640 CFR 60New Source Performance Standards Review for Stationary Combustion Turbines and Stationary Gas Turbines
The U.S. Environmental Protection Agency (EPA, or Agency) is finalizing amendments to the new source performance standards (NSPS) for stationary combustion turbines and stationary gas turbines pursuant to a review required by the Clean Air Act (CAA). As a result of this review, the EPA is establishing subcategories for new, modified, or reconstructed stationary combustion turbines based on size, rates of utilization, design efficiency, and fuel type. The EPA determined that combustion controls are the best system of emission reduction (BSER) for nitrogen oxide (NO<INF>X</INF>) emissions for mo
Effective Jan 15, 2026Docket EPA-HQ-OAR-2024-0419, FRL-11542-02-OARFR Doc. 2026-00677
- Final rulePublished Jan 9, 202640 CFR 62Approval and Promulgation of Delegation of Authority for Designated Facilities and Pollutants; Ohio; Delegation of Authority
The Environmental Protection Agency (EPA) is approving delegation of authority to the Ohio Environmental Protection Agency (Ohio EPA) for implementing and enforcing the Federal plan requirements for municipal solid waste (MSW) landfills that commenced construction on or before July 17, 2014, and have not been modified or reconstructed since July 17, 2014. Additionally, Ohio EPA has requested to withdraw an existing MSW landfill State plan which will be replaced with the delegation of authority of the Federal plan. On June 12, 2025, the Ohio EPA Director signed a Memorandum of Agreement concern
Effective Jan 9, 2026Docket EPA-R05-OAR-2025-0355, FRL-13131-01-R5FR Doc. 2026-00253
- Proposed rulePublished Jan 8, 202640 CFR 70Clean Air Act Title V Operating Permit Program Revision; District of Columbia
The Environmental Protection Agency (EPA) is proposing to approve a revision to the District of Columbia (DC, the District)'s title V operating permits program, submitted on behalf of the District by the Department of Energy and Environment (DOEE). The revision updated title V operating permit fees collected by DOEE in order to ensure that the title V operating program will continue to be adequately funded. The revision also reorganized some sections in Chapter 3 with no substantive change in content. This action is being taken under section 502 of the Clean Air Act (CAA).
Comments close Feb 9, 2026Docket EPA-R03-OAR-2025-1614, FRL-13044-01-R3FR Doc. 2026-00215
- Final rulePublished Jan 6, 202640 CFR 51Extension of the State Implementation Plan Due Date for the Regional Haze Third Implementation Period
The Environmental Protection Agency (EPA) is finalizing revisions to the Regional Haze Rule (RHR) under the Clean Air Act (CAA) to change the due date for the next round of State Implementation Plans (SIPs) for the third implementation period from July 31, 2028, to July 31, 2031. Under the RHR, States must submit plans to protect visibility in mandatory Class I Federal areas to make reasonable progress towards the national goal of preventing any future, and remedying any existing, impairment of visibility in Class I areas.
Effective Mar 9, 2026Docket EPA-HQ-OAR-2023-0262, FRL-12160-02-OARFR Doc. 2026-00003
- Final rulePublished Jan 2, 202640 CFR 63Congressional Review Act Revocation of 2024 Review of Final Rule Reclassification of Major Sources as Area Sources Under Section 112 of the Clean Air Act
The U.S. Environmental Protection Agency (EPA or Agency) is amending the Code of Federal Regulations (CFR) to remove the provisions finalized by the EPA in a 2024 rule titled "Review of Final Rule Reclassification of Major Sources as Area Sources Under Section 112 of the Clean Air Act" (2024 Rule) and restoring the language of the final rule titled "Reclassification of Major Sources as Area Sources Under Section 112 of the Clean Air Act," published November 19, 2020, and with minor corrections published December 28, 2020. Under the Congressional Review Act (CRA), Congress passed, and the Presi
Effective Jan 2, 2026Docket EPA-HQ-OAR-2023-0330, FRL-4908.2-01-OARFR Doc. 2025-24202
- Final rulePublished Jan 2, 202640 CFR 6140 CFR 63National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Oklahoma
The Oklahoma Department of Environmental Quality (ODEQ) has submitted updated regulations for receiving delegation and approval of its program for the implementation and enforcement of certain National Emission Standards for Hazardous Air Pollutants (NESHAP) for all sources as provided for under previously approved delegation mechanisms. The updated State regulations incorporate by reference certain NESHAP promulgated by the Environmental Protection Agency (EPA) at parts 61 and 63, as they existed through June 30, 2023. The EPA is providing notice that it is taking final action to approve the
Effective Feb 2, 2026Docket EPA-R06-OAR-2020-0086, FRL-12761-02-R6FR Doc. 2025-24149
- Final rulePublished Dec 18, 202540 CFR 6040 CFR 6140 CFR 63New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Louisiana
The Louisiana Department of Environmental Quality (LDEQ) has submitted updated regulations for receiving delegation and approval of its program for the implementation and enforcement of certain New Source Performance Standards (NSPS) and National Emission Standards for Hazardous Air Pollutants (NESHAP) for all sources (both part 70 and non-part 70 sources), as provided for under previously approved delegation mechanisms. The updated State regulations incorporate by reference certain NSPS and NESHAP promulgated by the Environmental Protection Agency (EPA) at parts 60, 61 and 63, as they existed
Effective Jan 20, 2026Docket EPA-R06-OAR-2010-1054, FRL-12688-02-R6FR Doc. 2025-23284
- Final rulePublished Dec 18, 202540 CFR 60New Source Performance Standards; Delegation of Authority to Oklahoma
The Environmental Protection Agency (EPA) is approving updates to the Code of Federal Regulations that reflect Oklahoma's current New Source Performance Standards (NSPS) delegation status and the mailing address for the Oklahoma Department of Environmental Quality (ODEQ). The ODEQ submitted updated regulations for receiving delegation of EPA authority for implementation and enforcement of certain NSPS. The updated State regulations incorporate by reference certain NSPS promulgated by EPA, as they existed through June 30, 2023. The delegation of authority for implementation and enforcement appl
Effective Jan 20, 2026Docket EPA-R06-OAR-2010-0580, FRL-12826-02-R6FR Doc. 2025-23275
- Final rulePublished Dec 3, 202540 CFR 60Oil and Natural Gas Sector Climate Review: Extension of Deadlines in Standards of Performance for New, Reconstructed, and Modified Sources and Emissions Guidelines for Existing Sources
The U.S. Environmental Protection Agency (EPA) is taking final action to respond to comments on an interim final rule (IFR) related to the new source performance standards (NSPS) and emissions guidelines (EG) for crude oil and natural gas facilities established at 40 CFR part 60, subparts OOOOb and OOOOc. Specifically, the EPA is responding to comments on the IFR published in the Federal Register on July 31, 2025, that extended deadlines for certain provisions related to control devices, equipment leaks, storage vessels, process controllers, and covers/closed vent systems; extended the date fo
Effective Dec 3, 2025Docket EPA-HQ-OAR-2025-0162, FRL-12675-02-OARFR Doc. 2025-21788
- Proposed rulePublished Nov 28, 202540 CFR 5240 CFR 70Air Plan Approval; Missouri; Reporting Emission Data, Emission Fees, and Process Information
The Environmental Protection Agency (EPA) is proposing approval of revisions to the Missouri State Implementation Plan (SIP), and Operating Permits Program related to Reporting Emission Data, Emission Fees, and Process Information. The revisions set emission fees and a base fee for calendar years 2025-2028 and beyond, add 1- Bromopropane to the category 1 Hazardous Air Pollutant list in table 1, update two publication dates for material that is incorporated by reference and make minor administrative changes to the rule. These revisions do not impact the stringency of the SIP or have an adverse
Comments close Dec 29, 2025Docket EPA-R07-OAR-2025-2830, FRL-13059-01-R7FR Doc. 2025-21346
- Final rulePublished Nov 26, 202540 CFR 62Delegation of Authority to North Carolina and Forsyth County of the Federal Plan for Existing Landfills
The Environmental Protection Agency (EPA) is providing notification that it has approved requests from the state of North Carolina, submitted through the North Carolina Department of Environmental Quality (NCDEQ), and the Forsyth County Office of Environmental Assistance and Protection (FCOEAP or District) for the delegation of authority to implement and enforce the Federal Plan Requirements for Municipal Solid Waste (MSW) landfills that commenced construction on or before July 17, 2014, and have not been modified or reconstructed since July 17, 2014 (Federal Plan). The memorandum of agreement
Effective Dec 26, 2025Docket EPA-R04-OAR-2024-0171, FRL-11883-02-R4FR Doc. 2025-21306
- Proposed rulePublished Nov 20, 202540 CFR 70Air Plan Approval; Maine; Chapter 140: Part 70 Air Emission License Regulation
The Environmental Protection Agency (EPA) is proposing to approve a Clean Air Act (CAA) operating permit program revision submitted by the State of Maine. The revisions include minor changes to Maine's operating permit program that are considered clarifications, that correct grammar, that codify longstanding practices, or that are necessary to utilize an expected future electronic application system. The revisions also include provisions allowing the public comment period on a draft permit to run concurrently with EPA's review of a proposed permit. The intended effect of EPA's action is to pro
Comments close Dec 22, 2025Docket EPA-R01-OAR-2025-0282, FRL-13016-01-R1FR Doc. 2025-20498
- Proposed rulePublished Nov 20, 202540 CFR 62Approval and Promulgation of Delegation of Authority for Designated Facilities and Pollutants; Allegheny County; Delegation of Authority of the Federal Plan for Existing Sewage Sludge Incineration Units
The Environmental Protection Agency (EPA) is proposing to approve a request from the Allegheny County Health Department (ACHD) for delegation of authority to implement and enforce the Federal Plan Requirements for Sewage Sludge Incineration (SSI) units within Allegheny County in the Commonwealth of Pennsylvania. On April 29, 2016, the EPA promulgated the Federal Plan for SSI units to fulfill the requirements of sections 111(d)/129 of the Clean Air Act (CAA). The Federal Plan addresses the implementation and enforcement of the emission guidelines applicable to existing SSI units located in area
Comments close Dec 22, 2025Docket EPA-R03-OAR-2025-0487, FRL-12943-01-R3FR Doc. 2025-20411
- Proposed rulePublished Nov 20, 202540 CFR 62Approval and Promulgation of State Air Quality Plans (Negative Declarations) for Designated Facilities and Pollutants; District of Columbia
The Environmental Protection Agency (EPA) is proposing to approve the negative declarations submitted by the District of Columbia Department of Energy and Environment (DCDOEE) on July 19, 2024 and August 28, 2024. The negative declarations submitted by the DCDOEE certify that there are no existing large municipal waste combustors (LMWC), crude oil and natural gas facilities, or electric utility generating units subject to sections 111(d) and 129 of the Clean Air Act (CAA) within the jurisdiction of the District of Columbia.
Comments close Dec 22, 2025Docket EPA-R03-OAR-2025-1746, FRL-13006-01-R3FR Doc. 2025-20419
- Proposed rulePublished Nov 20, 202540 CFR 70Operating Permit Program Approval; New Hampshire; Revised Definitions
The Environmental Protection Agency (EPA) is proposing to approve revisions to the State of New Hampshire's Clean Air Act (CAA) title V operating permit program. These revisions amend the definitions of "hazardous air pollutant" and "regulated air pollutant" in New Hampshire regulations to remain consistent with Federal permitting and air toxics requirements in accordance with the CAA.
Comments close Dec 22, 2025Docket EPA-R01-OAR-2025-1608, FRL-13018-01-R1FR Doc. 2025-20496
- Proposed rulePublished Oct 2, 202540 CFR 51Visibility Protection: Regional Haze State Plan Requirements Rule Revision
The Environmental Protection Agency (EPA or Agency) is soliciting information and requesting comment to assist in the development of regulatory changes pertaining to the restructuring of the Regional Haze Rule (RHR). Under the current RHR, states must submit state implementation plans (SIPs) to protect visibility in mandatory Class I Federal areas (Class I areas) to demonstrate reasonable progress towards the national visibility goal. The Agency is seeking input regarding how the EPA can meaningfully revise the RHR to streamline regulatory requirements impacting states' visibility improvement
Comments close Dec 1, 2025Docket EPA-HQ-OAR-2025-1477, FRL-6714-04-OARFR Doc. 2025-19280
- Final rulePublished Sep 25, 202540 CFR 5240 CFR 6240 CFR 70Air Plan Approval; Missouri; Definitions and Common Reference Tables
The Environmental Protection Agency (EPA) is taking final action to approve revisions to the State Implementation Plan (SIP) for the State of Missouri related to Definitions and Common Reference Tables used in Missouri rules. EPA has also previously approved this rule as part of the air planning and permitting program. Some of the definitions are associated with those programs, even though many of the definitions pertain only to the SIP. These revisions do not impact the stringency of the SIP or have an adverse effect on air quality. The EPA's final approval of this rule revision is being done
Effective Oct 27, 2025Docket EPA-R07-OAR-2025-0289, FRL-12821-02-R7FR Doc. 2025-18568
- Proposed rulePublished Sep 22, 202540 CFR 98Reconsideration of the Greenhouse Gas Reporting Program
Docket EPA-HQ-OAR-2025-0186, FRL-12720-01-OARFR Doc. C1-2025-17923
- Proposed rulePublished Sep 16, 202540 CFR 98Reconsideration of the Greenhouse Gas Reporting Program
The U.S. Environmental Protection Agency (EPA) is proposing to amend the Greenhouse Gas Reporting Program (GHGRP) to remove program obligations for most source categories, including the distribution segment of the petroleum and natural gas systems source category (subpart W--Petroleum and Natural Gas Systems), and suspend program obligations for the remaining subpart W segments until reporting year 2034.
Comments close Nov 3, 2025Docket EPA-HQ-OAR-2025-0186, FRL-12720-01-OARFR Doc. 2025-17923
- Final rulePublished Sep 5, 202540 CFR 5240 CFR 62Air Plan Approval; Missouri; Control of Sulfur Dioxide Emissions and Approval and Promulgation of State Plan (Negative Declaration) for Designated Facilities and Pollutants
The Environmental Protection Agency (EPA) is taking final action to approve revisions to the Missouri State Implementation Plan (SIP) related to replacing the previous statewide sulfur dioxide (SO<INF>2</INF>) rule with the latest version of a newer SO<INF>2</INF> rule (10 CSR 10-6.261). The SIP revisions include removing outdated requirements and reinstating SO<INF>2</INF> emission limits for the Ameren-Labadie and Evergy-Hawthorn power plants. The revisions do not impact the stringency of the SIP, nor do they impact the state's ability to attain or maintain the National Ambient Air Quality S
Effective Oct 6, 2025Docket EPA-R07-OAR-2025-0263, FRL-12807-02-R7FR Doc. 2025-17028
- Final rulePublished Aug 26, 202540 CFR 6040 CFR 62Commercial and Industrial Solid Waste Incineration Units: Temporary-Use Incinerators and Air Curtain Incinerators Used in Disaster Recovery
The U.S. Environmental Protection Agency (EPA) is taking interim final action to provide for the temporary use of incineration units subject to commercial and industrial solid waste incinerator (CISWI) regulations during disaster recovery. Currently, only other solid waste incinerators (OSWI) are authorized to combust debris from a disaster or emergency on a temporary basis without having to comply with applicable Clean Air Act (CAA) section 129 requirements. We are also authorizing such temporary use for incinerators (including air curtain incinerators (ACI)) subject to CISWI regulations by a
Effective Aug 26, 2025Comments close Oct 10, 2025Docket EPA-HQ-OAR-2003-0119, FRL-12232-03-OARFR Doc. 2025-16360
- Final rulePublished Aug 25, 202540 CFR 62Florida; Approval of State Plan for Control of Emissions From Commercial and Industrial Solid Waste Incineration Units
The Environmental Protection Agency is taking final action to approve a state plan submitted by the State of Florida, through the Florida Department of Environmental Protection (FDEP) on May 31, 2017, that was supplemented on December 19, 2017, and February 2, 2018, for implementing and enforcing the Emissions Guidelines (EG) applicable to existing Commercial and Industrial Solid Waste Incineration (CISWI) units. The State plan provides for implementation and enforcement of the EG, as finalized by the EPA on February 7, 2013, and amended on June 23, 2016, applicable to existing CISWI units for
Effective Sep 24, 2025Docket EPA-R04-OAR-2018-0184, FRL-12577-01-R4FR Doc. 2025-16193
- Final rulePublished Aug 22, 202540 CFR 6040 CFR 63Technical Correction: Extension of Deadlines: Standards of Performance for New, Reconstructed, and Modified Sources and Emissions Guidelines for Existing Sources: Oil and Natural Gas Sector Climate Review Interim Final Rule; National Emission Standards for Hazardous Air Pollutants for Integrated Iron and Steel Manufacturing Facilities; National Emission Standards for Hazardous Air Pollutants for Coke Ovens: Pushing, Quenching, and Battery Stacks, and Coke Oven Batteries
The Environmental Protection Agency (EPA) is correcting a document that appeared in the Federal Register (FR) on August 15, 2025. The EPA finalized the document announcing three public hearings and comment period extensions for the following rules: Extension of Deadlines: Standards of Performance for New, Reconstructed, and Modified Sources and Emissions Guidelines for Existing Sources: Oil and Natural Gas Sector Climate Review Interim Final Rule; National Emission Standards for Hazardous Air Pollutants for Integrated Iron and Steel Manufacturing Facilities; National Emission Standards for Haz
Effective Aug 22, 2025Docket EPA-HQ-OAR-2002-0083, EPA-HQ-OAR-2002-0085, EPA-HQ-OAR-2003-0051, EPA-HQ-OAR-2025-0162, FRL-12958-01-OARFR Doc. 2025-16152
- Final rulePublished Aug 15, 202540 CFR 6040 CFR 63Extension of Deadlines: Standards of Performance for New, Reconstructed, and Modified Sources and Emissions Guidelines for Existing Sources: Oil and Natural Gas Sector Climate Review Interim Final Rule; National Emission Standards for Hazardous Air Pollutants for Integrated Iron and Steel Manufacturing Facilities; National Emission Standards for Hazardous Air Pollutants for Coke Ovens: Pushing, Quenching, and Battery Stacks, and Coke Oven Batteries
On July 31, 2025, the Environmental Protection Agency (EPA) promulgated amendments to compliance dates within the interim final rule titled Extension of Deadlines in Standards of Performance for New, Reconstructed, and Modified Sources and Emissions Guidelines for Existing Sources: Oil and Natural Gas Sector Climate Review Final Rule, On July 3, 2025, the EPA promulgated amendments to compliance dates in the National Emission Standards for Hazardous Air Pollutants for Integrated Iron and Steel Manufacturing Facilities (Integrated Iron and Steel Manufacturing) through an interim final rule. On
Comments close Oct 6, 2025Docket EPA-HQ-OAR-2002-0083, EPA-HQ-OAR-2002-0085, EPA-HQ-OAR-2003-0051, EPA-HQ-OAR-2025-0162, FRL-12916-01-OARFR Doc. 2025-15614
- Final rulePublished Jul 31, 202540 CFR 60Extension of Deadlines in Standards of Performance for New, Reconstructed, and Modified Sources and Emissions Guidelines for Existing Sources: Oil and Natural Gas Sector Climate Review Final Rule
The U.S. Environmental Protection Agency (EPA) is taking interim final action to extend certain deadlines within the final rule titled "Standards of Performance for New, Reconstructed, and Modified Sources and Emissions Guidelines for Existing Sources: Oil and Natural Gas Sector Climate Review," 89 FR 16820 (March 8, 2024) (hereafter "2024 final rule"). Specifically, the EPA is extending deadlines for certain provisions related to control devices, equipment leaks, storage vessels, process controllers, and covers/closed vent systems in "Subpart OOOOb--Standards of Performance for Crude Oil and
Effective Jul 31, 2025Comments close Sep 2, 2025Docket EPA-HQ-OAR-2025-0162, FRL-12675-01-OARFR Doc. 2025-14531
- Proposed rulePublished Jul 21, 202540 CFR 5140 CFR 52Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NNSR): Regulations Related To Project Emissions Accounting; Withdrawal of Proposed Rule
The U.S. Environmental Protection Agency (EPA) is withdrawing the proposed rule titled "Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NNSR): Regulations Related to Project Emissions Accounting" that published in the Federal Register on May 3, 2024. Based on comments received, the EPA has determined that there is insufficient justification for the proposed rule revisions to the New Source Review (NSR) program applicability provisions under the Clean Air Act (CAA) and that the proposed revisions could result in unnecessary additional burden on regulated entit
Docket EPA-HQ-OAR-2022-0381, FRL-9249-03-OARFR Doc. 2025-13598
- Proposed rulePublished Jul 10, 202540 CFR 62Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; Oklahoma; Control of Emissions From Existing Other Solid Waste Incineration Units, Hospital/Medical/Infectious Waste Incinerator Units, and Commercial and Industrial Solid Waste Incineration Units
Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is notifying the public that we have received CAA section 111(d)/129 negative declarations from Oklahoma for existing incinerators subject to the Other Solid Waste Incineration units (OSWI), Hospital/Medical/ Infectious Waste Incinerator units (HMIWI), and Commercial and Industrial Solid Waste Incineration Units (CISWI) Emission Guidelines (EG). These negative declarations certify that existing incinerators subject to the OSWI, HMIWI, and CISWI EG and the requirements of sections 111(d) and 129 of
Comments close Aug 11, 2025Docket EPA-R06-OAR-2020-0610, FRL-12763-01-R6FR Doc. 2025-12866
- Proposed rulePublished Jul 10, 202540 CFR 6140 CFR 63National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Oklahoma
The Oklahoma Department of Environmental Quality (ODEQ) has submitted updated regulations for receiving delegation and approval of its program for the implementation and enforcement of certain National Emission Standards for Hazardous Air Pollutants (NESHAP) for all sources, as provided for under previously approved delegation mechanisms. The updated State regulations incorporate by reference certain NESHAP promulgated by the Environmental Protection Agency (EPA), as they existed through June 30, 2023. The EPA is proposing to approve ODEQ's requested delegation update. The proposed delegation
Comments close Aug 11, 2025Docket EPA-R06-OAR-2020-0086, FRL-12761-01-R6FR Doc. 2025-12800
- Final rulePublished Jul 7, 202540 CFR 62Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; Oklahoma; Control of Emissions From Existing Municipal Solid Waste Landfills
Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is approving the CAA section 111(d) state plan submitted by the State of Oklahoma for sources subject to the Municipal Solid Waste (MSW) Landfills Emission Guidelines (EG). The Oklahoma MSW landfills plan was submitted to fulfill the state's obligations under CAA section 111(d) to implement and enforce the requirements under the MSW Landfills EG. The EPA is approving the state plan and amending the agency regulations in accordance with the requirements of the CAA.
Effective Aug 6, 2025Docket EPA-R06-OAR-2024-0232, FRL-12425-02-R6FR Doc. 2025-12599
- Proposed rulePublished Jul 7, 202540 CFR 60New Source Performance Standards; Delegation of Authority to Oklahoma
The Environmental Protection Agency (EPA) is proposing to update federal regulations to reflect Oklahoma's current New Source Performance Standards (NSPS) delegation status and the mailing address for the Oklahoma Department of Environmental Quality (ODEQ). The ODEQ has submitted updated regulations for the delegation of EPA authority for implementation and enforcement of certain NSPS. The updated State regulations incorporate by reference certain NSPS promulgated by EPA, as they existed through June 30, 2023. The delegation of authority for implementation and enforcement applies to sources su
Comments close Aug 6, 2025Docket EPA-R06-OAR-2010-0580, FRL-12826-01-R6FR Doc. 2025-12520
- Final rulePublished Jun 30, 202540 CFR 60Standards of Performance for New Stationary Sources and Emission Guidelines for Existing Sources: Other Solid Waste Incineration Units Review
This action finalizes the periodic review by the U.S. Environmental Protection Agency (EPA) of the emissions standards and other requirements for Other Solid Waste Incineration (OSWI) units in the OSWI New Source Performance Standards (NSPS) and Emission Guidelines (EG). The EPA is finalizing applicability-related and definitional changes; changes to OSWI subcategories and the standards for the new subcategories; changes to the startup, shutdown, and malfunction (SSM) provisions; and changes to testing, monitoring, recordkeeping, and reporting requirements. We are also making other miscellaneo
Effective Aug 29, 2025Docket EPA-HQ-OAR-2003-0156, FRL-7547-02-OARFR Doc. 2025-11446
- Proposed rulePublished Jun 27, 202540 CFR 5240 CFR 62Air Plan Approval; Missouri; Control of Sulfur Dioxide Emissions and Approval and Promulgation of State Plan (Negative Declaration) for Designated Facilities and Pollutants
The EPA is proposing to approve revisions to the Missouri State Implementation Plan (SIP) submitted by the State of Missouri. Missouri requests that EPA approve replacing the previous statewide sulfur dioxide (SO<INF>2</INF>) rule in the SIP with the latest version of a newer SO<INF>2</INF> rule (10 CSR 10-6.261). This action would result in a number of changes to the SIP, including removing outdated requirements as a result of facilities that have historically closed or switched from coal to lower sulfur fuels, as well as those that have become subject to more stringent SO<INF>2</INF> require
Comments close Jul 28, 2025Docket EPA-R07-OAR-2025-0263, FRL-12807-01-R7FR Doc. 2025-11825
- Proposed rulePublished Jun 27, 202540 CFR 5240 CFR 6240 CFR 70Air Plan Approval; Missouri; Definitions and Common Reference Tables
The Environmental Protection Agency (EPA) is proposing to approve revisions to the Missouri State Implementation Plan (SIP) related to Definitions and Common Reference Tables used in Missouri rules. EPA has also previously approved this rule as part of the air planning and permitting program. Some of the definitions are associated with those programs, even though many of the definitions pertain only to the SIP. These revisions do not impact the stringency of the SIP or have an adverse effect on air quality. The EPA's proposed approval of this rule revision is being done in accordance with the
Comments close Jul 28, 2025Docket EPA-R07-OAR-2025-0289, FRL-12821-01-R7FR Doc. 2025-11821
- Proposed rulePublished Jun 23, 202540 CFR 6040 CFR 6140 CFR 63New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Louisiana
The Louisiana Department of Environmental Quality (LDEQ) has submitted updated regulations for receiving delegation and approval of its program for the implementation and enforcement of certain New Source Performance Standards (NSPS) and National Emission Standards for Hazardous Air Pollutants (NESHAP) for all sources, as provided for under previously approved delegation mechanisms. The updated State regulations incorporate by reference certain NSPS and NESHAP promulgated by the Environmental Protection Agency (EPA), as they existed through July 1, 2021. EPA is providing notice that it is upda
Comments close Jul 23, 2025Docket EPA-R06-OAR-2010-1054, FRL-12688-01-R6FR Doc. 2025-11341
- Final rulePublished Jun 20, 202540 CFR 6140 CFR 63National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Oklahoma
The Oklahoma Department of Environmental Quality (ODEQ) has submitted updated regulations for receiving delegation and approval of its program for the implementation and enforcement of certain National Emission Standards for Hazardous Air Pollutants (NESHAP) for all sources, as provided for under previously approved delegation mechanisms. The updated State regulations incorporate by reference certain NESHAP promulgated by the Environmental Protection Agency (EPA), as they existed through June 30, 2022. The EPA is providing notice that it is taking final action to approve the delegation of cert
Effective Jul 21, 2025Docket EPA-R06-OAR-2020-0086, FRL-12482-02-R6FR Doc. 2025-11265
- Final rulePublished May 19, 202540 CFR 240 CFR 9840 CFR 99Congressional Review Act Revocation of Waste Emissions Charge for Petroleum and Natural Gas Systems: Procedures for Facilitating Compliance, Including Netting and Exemptions
Congress has passed and the President has signed a joint resolution of disapproval under the Congressional Review Act (CRA) of the Environmental Protection Agency's (EPA) final rule titled, "Waste Emissions Charge for Petroleum and Natural Gas Systems: Procedures for Facilitating Compliance, Including Netting and Exemptions" (2024 WEC Final Rule). The 2024 WEC Final Rule implemented and facilitated compliance with the requirements of the Waste Emissions Charge in the Clean Air Act's (CAA) Methane Emissions Reduction Program. Under the joint resolution and by operation of the CRA, the 2024 WEC
Effective May 19, 2025Docket EPA-HQ-OAR-2023-0434, FRL-12723-01-OARFR Doc. 2025-08688
- Final rulePublished Mar 20, 202540 CFR 98Extending the Reporting Deadline Under the Greenhouse Gas Reporting Rule for 2024 Data
The EPA is promulgating this final rule to extend the reporting deadline under the Greenhouse Gas Reporting Rule for reporting year 2024 data from March 31, 2025, to May 30, 2025. This rule only changes the reporting deadline for annual greenhouse gas (GHG) reports for reporting year 2024. This rule does not change the reporting deadline for future years, and it does not change the requirements for what regulated entities must report.
Effective Mar 20, 2025Docket EPA-HQ-OAR-2025-0096, FRL-12676-01-OARFR Doc. 2025-04724
- Final rulePublished Jan 28, 202540 CFR 5140 CFR 5240 CFR 8140 CFR 751Delay of Effective Date for 4 Final Regulations Published by the Environmental Protection Agency Between November 29, 2024, and December 31, 2024
In accordance with the memorandum of January 20, 2025, from President Donald J. Trump, entitled "Regulatory Freeze Pending Review," this action temporarily delays until March 21, 2025, the effective date of the regulations listed in the table below. EPA has initially identified 4 regulations that meet the criteria in the memo and may identify additional regulations in subsequent notices.
Effective Mar 21, 2025Docket FRL-12583-01-OAFR Doc. 2025-01866
- Final rulePublished Jan 17, 202540 CFR 51State Implementation Plan Submittal Deadlines and Implementation Requirements for Reclassified Nonattainment Areas Under the Ozone National Ambient Air Quality Standards
The Environmental Protection Agency (EPA) is finalizing deadlines for submission of state implementation plan (SIP) revisions and implementation of the relevant control requirements that will apply for nonattainment areas reclassified as Moderate, Serious, and Severe under the current and any future ozone National Ambient Air Quality Standards (NAAQS) as a result of either failing to attain the standard by the applicable classification attainment date or the EPA granting a voluntary reclassification request. This final rule articulates the implementation requirements and timeframes that will a
Effective Feb 18, 2025Docket EPA-HQ-OAR-2024-0333, FRL-11817-02-OARFR Doc. 2025-00336
- Final rulePublished Jan 16, 202540 CFR 50Reference Measurement Principle and Calibration Procedure for the Measurement of Ozone in the Atmosphere (Chemiluminescence Method); Correction
The Environmental Protection Agency (EPA) is correcting a final rule published in the Federal Register on October 12, 2023, that became effective on November 13, 2023. The final rule updated the current ozone absorption cross-section to the recommended consensus- based value of 1.1329x10<SUP>-17</SUP> cm\2\ molecule<SUP>-1</SUP> or 304.39 atm<SUP>-1</SUP> cm<SUP>-1</SUP>. After publication, the EPA became aware of an error in the preamble text regarding the date for State, local, and Tribal monitoring agencies to complete implementation of the new ozone cross-section value, as well as a lack o
Effective Jan 16, 2025Docket EPA-HQ-OAR-2022-0007, FRL 9344.1-01-OARFR Doc. 2025-00946
- Final rulePublished Dec 27, 202440 CFR 62Partial Approval, Partial Disapproval and Promulgation of State Plans for Designated Facilities and Pollutants; Spokane Regional Clean Air Agency; Control of Emissions From Existing Large Municipal Waste Combustors
The Environmental Protection Agency (EPA) is taking final action to partially approve and partially disapprove a July 18, 2022, Clean Air Act (CAA) State Plan submitted by the Spokane Regional Clean Air Agency (SRCAA) to establish emission limits for existing large municipal waste combustors (MWC) and to provide for the implementation and enforcement of these limits. SRCAA submitted this State Plan to fulfill its requirements under the CAA in response to the EPA's May 10, 2006, promulgation of Emissions Guidelines and Compliance Times for Large MWC Constructed on or before September 20, 1994 (
Effective Jan 27, 2025Docket EPA-R10-OAR-2023-0224, FRL-10859-02-R10FR Doc. 2024-30535
- Final rulePublished Dec 27, 202440 CFR 50Review of the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen, Oxides of Sulfur, and Particulate Matter
Based on the Environmental Protection Agency's (EPA's) review of the air quality criteria for ecological effects and secondary national ambient air quality standards (NAAQS) for oxides of nitrogen (N oxides), oxides of sulfur (SO<INF>X</INF>), and particulate matter (PM), the EPA is revising the existing secondary sulfur dioxide (SO<INF>2</INF>) standard to an annual average, averaged over three consecutive years, with a level of 10 parts per billion (ppb). Additionally, the Agency is retaining the existing secondary standards for N oxides and PM, without revision. The EPA is also finalizing r
Effective Jan 27, 2025Docket EPA-HQ-OAR-2014-0128, FRL-5788-05-OARFR Doc. 2024-29463
- Proposed rulePublished Dec 23, 202440 CFR 6140 CFR 63National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Oklahoma
The Oklahoma Department of Environmental Quality (ODEQ) has submitted updated regulations for receiving delegation and approval of its program for the implementation and enforcement of certain National Emission Standards for Hazardous Air Pollutants (NESHAP) for all sources as provided for under previously approved delegation mechanisms. The updated State regulations incorporate by reference certain NESHAP promulgated by the Environmental Protection Agency (EPA) as they existed through June 30, 2022. The EPA is proposing to approve ODEQ's requested delegation update. The proposed delegation of
Comments close Jan 22, 2025Docket EPA-R06-OAR-2020-0086, FRL-12482-01-R6FR Doc. 2024-30245
- Proposed rulePublished Dec 23, 202440 CFR 51Regional Haze Third Implementation Period; Extension of the State Implementation Plan Due Date
The Environmental Protection Agency (EPA) is proposing revisions to the Regional Haze Rule under the Clean Air Act (CAA) to change the due date for the next round of State Implementation Plans (SIPs) for the third implementation period. Under the Regional Haze Rule, States must submit plans to protect visibility in mandatory Class I Federal areas (Class I areas) to continue reasonable progress towards natural visibility.
Comments close Feb 6, 2025Docket EPA-HQ-OAR-2023-0262, FRL-12160-01-OARFR Doc. 2024-30212
- Final rulePublished Dec 19, 202440 CFR 5040 CFR 58Reconsideration of the National Ambient Air Quality Standards for Particulate Matter; Correction
The Environmental Protection Agency (EPA) is correcting a final rule published in the Federal Register on March 6, 2024, that became effective on May 6, 2024. The final rule revised the primary annual PM<INF>2.5</INF> standard by lowering the level from 12.0 [micro]g/m\3\ to 9.0 [micro]g/m\3\, retained the current primary 24- hour PM<INF>2.5</INF> standard and the primary 24-hour PM<INF>10</INF> standard, retained the secondary 24-hour PM<INF>2.5</INF> standard, secondary annual PM<INF>2.5</INF> standard, and secondary 24-hour PM<INF>10</INF> standard, and finalized revisions to the Air Qualit
Effective Dec 19, 2024Docket EPA-HQ-OAR-2015-0072, FRL-8635.1-02-OARFR Doc. 2024-29223
- Proposed rulePublished Dec 18, 202440 CFR 62Approval and Promulgation of State Air Quality Plans for Designated Facilities and Pollutants; Oklahoma; Control of Emissions From Existing Municipal Solid Waste Landfills
Pursuant to the Federal Clean Air Act (CAA or the Act), the Environmental Protection Agency (EPA) is proposing to approve the CAA section 111(d)State plan submitted by the State of Oklahoma for sources subject to the Municipal Solid Waste (MSW) Landfills Emission Guidelines (EG). The Oklahoma MSW landfills plan was submitted to fulfill the State's obligations under CAA section 111(d) to implement and enforce the requirements under the MSW Landfills EG. The EPA is proposing to approve the State plan and amend the agency regulations in accordance with the requirements of the CAA.
Comments close Feb 18, 2025Docket EPA-R06-OAR-2024-0232, FRL-12425-01-R6FR Doc. 2024-29454
- Final rulePublished Dec 16, 202440 CFR 62Approval of State Plans for Designated Facilities and Pollutants; MO; Approval and Promulgation of Implementation Plans; Control of Emissions From Existing Municipal Solid Waste Landfills
The Environmental Protection Agency (EPA) is approving a Clean Air Act (CAA) plan and two state rules submitted by the Missouri Department of Natural Resources (MoDNR) on July 25, 2022. This plan was submitted to fulfill the state's obligations under the CAA to implement and enforce the requirements of the Emissions Guidelines and Compliance Times for municipal solid waste (MSW) landfills. This plan includes an inventory of affected sources and explains how the state rules fulfill the regulatory requirements needed for EPA to approve the plan.
Effective Jan 15, 2025Docket EPA-R07-OAR-2023-0199, FRL-10830.1-01-R7FR Doc. 2024-29404
- Final rulePublished Dec 11, 202440 CFR 62Federal Plan Requirements for Commercial and Industrial Solid Waste Incineration Units That Commenced Construction On or Before June 4, 2010 and Have Not Been Modified or Reconstructed Since August 7, 2013
This action finalizes the Federal plan for existing commercial and industrial solid waste incineration units (CISWI). This final action implements the U.S. Environmental Protection Agency's (EPA) emission guidelines adopted on February 7, 2013, as amended on June 23, 2016, and on April 16, 2019, in states that do not have an approved state plan implementing the emission guidelines in place by the effective date of this Federal plan. The implementation of the emission guidelines will result in emissions reductions of the regulated pollutants including cadmium, hydrogen chloride, lead, mercury,
Effective Jan 10, 2025Docket EPA-HQ-OAR-2016-0664, FRL-5960-02-OARFR Doc. 2024-26650
- Final rulePublished Nov 29, 202440 CFR 51Guideline on Air Quality Models; Enhancements to the AERMOD Dispersion Modeling System
In this action, the Environmental Protection Agency (EPA) promulgates revisions to the Guideline on Air Quality Models ("Guideline"). The Guideline has been incorporated into the EPA's regulations, satisfying a requirement under the Clean Air Act (CAA), for the EPA to specify, with reasonable particularity, models to be used in the Prevention of Significant Deterioration (PSD) program. The Guideline provides EPA-preferred models and other recommended techniques, as well as guidance for their use in predicting ambient concentrations of air pollutants. The EPA is revising the Guideline, includin
Effective Jan 28, 2025Docket EPA-HQ-OAR-2022-0872, FRL-10391-02-OARFR Doc. 2024-27636
- Final rulePublished Nov 18, 202440 CFR 240 CFR 9840 CFR 99Waste Emissions Charge for Petroleum and Natural Gas Systems: Procedures for Facilitating Compliance, Including Netting and Exemptions
The Environmental Protection Agency (EPA) is promulgating a regulation to facilitate compliance with the requirements of the Waste Emissions Charge in the Clean Air Act's (CAA) Methane Emissions Reduction Program (MERP). Enacted as part of the Inflation Reduction Act (IRA), this program requires the EPA to impose and collect an annual charge on methane emissions that exceed waste emissions thresholds specified by Congress.
Effective Jan 17, 2025Docket EPA-HQ-OAR-2023-0434, FRL-10246.1-03-OARFR Doc. 2024-26643
- Proposed rulePublished Nov 12, 202440 CFR 51Air Quality: Revision to the Regulatory Definition of Volatile Organic Compounds-Exclusion of (Z)-1-chloro-2,3,3,3-tetrafluoropropene (HCFO-1224yd(Z))
The U.S. Environmental Protection Agency (EPA) is proposing to revise the EPA's regulatory definition of volatile organic compounds (VOC) under the Clean Air Act (CAA). This action proposes to add (Z)-1- chloro-2,3,3,3-tetrafluoropropene (also known as HCFO-1224yd(Z); CAS number 111512-60-8) to the list of compounds excluded from the regulatory definition on the basis that this compound makes a negligible contribution to tropospheric ozone (O<INF>3</INF>) formation.
Comments close Jan 13, 2025Docket EPA-HQ-OAR-2023-0295, FRL-10823-01-OARFR Doc. 2024-25971
- Final rulePublished Nov 8, 202440 CFR 5140 CFR 7940 CFR 8040 CFR 8540 CFR 12240 CFR 30040 CFR 37240 CFR 50140 CFR 70440 CFR 74540 CFR 76340 CFR 79040 CFR 103640 CFR 1037Inflation Adjustment References for Civil Monetary Penalty Amounts in Title 40 of the Code of Federal Regulations
The U.S. Environmental Protection Agency (EPA) is taking direct final action to address outdated maximum and minimum statutory civil monetary penalty amounts by adding language that refers readers to the up-to-date maximum and minimum statutory civil monetary penalty amounts. The Federal Civil Penalties Inflation Adjustment Act of 1990, as amended through the Federal Civil Penalties Inflation Adjustment Act Improvements Act of 2015 requires the EPA to annually issue rules that adjust the statutory maximum and minimum civil penalty amounts under the various environmental laws implemented by the
Effective Nov 8, 2024Comments close Dec 9, 2024Docket EPA-HQ-OECA-2024-0208, FRL 11265-02-OECAFR Doc. 2024-25669
- Final rulePublished Oct 31, 202440 CFR 140 CFR 2140 CFR 5940 CFR 6040 CFR 6140 CFR 6340 CFR 6540 CFR 14740 CFR 37440 CFR 70740 CFR 763Regional Office Address
The Environmental Protection Agency (EPA) is amending its regulations to reflect a change in address and organization names for EPA's Region 4 office. This action is editorial in nature and is intended to provide accuracy and clarity to EPA's regulations.
Effective Oct 31, 2024Docket EPA-R04-OAR-2023-0519, FRL-12260-01-R4FR Doc. 2024-25014
- Final rulePublished Oct 22, 202440 CFR 5140 CFR 52Prevention of Significant Deterioration (PSD): Paragraph Designation Corrections
The Environmental Protection Agency (EPA) is amending its Prevention of Significant Deterioration (PSD) regulations to correct the fourth-level paragraph designations to conform with the Office of the Federal Register (OFR) requirements. This is a ministerial final rule action that involves minor technical corrections.
Effective Oct 22, 2024Docket EPA-HQ-OAR-2024-0234, FRL-11945-01-OARFR Doc. 2024-24281
- Proposed rulePublished Oct 11, 202440 CFR 62Approval and Promulgation of State Plans (Negative Declarations) for Designated Facilities and Pollutants: Maine and Massachusetts
The Environmental Protection Agency (EPA) is proposing to approve negative declarations in lieu of State plans to satisfy the requirements in the Emission Guidelines and Compliance Times for Commercial and Industrial Solid Waste Incineration Units for the State of Maine and the Commonwealth of Massachusetts. The negative declarations certify the states do not have any existing sources within their jurisdictions that must comply with the rule.
Comments close Nov 12, 2024Docket EPA-R01-OAR-2024-0462, FRL-12317-02-R1FR Doc. 2024-23173
- Proposed rulePublished Oct 4, 202440 CFR 51State Implementation Plan Submittal Deadlines and Implementation Requirements for Reclassified Nonattainment Areas Under the Ozone National Ambient Air Quality Standards
The Environmental Protection Agency (EPA) is proposing deadlines for submission of state implementation plan (SIP) revisions and implementation of the relevant control requirements that will apply for nonattainment areas reclassified as Moderate, Serious, and Severe under the current and any future ozone National Ambient Air Quality Standards (NAAQS) as a result of either failing to attain the standard by the applicable classification attainment date or the EPA granting a voluntary reclassification request. This proposal articulates the implementation requirements and timeframes that will appl
Comments close Nov 4, 2024Docket EPA-HQ-OAR-2024-0333, FRL-11817-01-OARFR Doc. 2024-22008
- Final rulePublished Sep 4, 202440 CFR 98Greenhouse Gas Reporting Rule: Revisions and Confidentiality Determinations for Petroleum and Natural Gas Systems; Correction
The Environmental Protection Agency (EPA) is correcting a final rule published in the Federal Register on May 14, 2024. The final rule amended requirements that apply to the petroleum and natural gas systems source category of the Greenhouse Gas Reporting Rule to ensure that reporting is based on empirical data, accurately reflects total methane emissions and waste emissions from applicable facilities and allows owners and operators of applicable facilities to submit empirical emissions data that appropriately demonstrate the extent to which a charge is owed under the Waste Emissions Charge. T
Effective Jan 1, 2025Docket EPA-HQ-OAR-2023-0234, FRL-10246-03-OARFR Doc. 2024-18933
- Final rulePublished Jun 27, 202440 CFR 6140 CFR 63Tennessee; National Emission Standards for Hazardous Air Pollutants; National Emission Standards for Hazardous Air Pollutants for Source Categories; Supplemental Delegations of Authority
On March 9, 2023, the Tennessee Department of Environment and Conservation's (TDEC or State) Division of Air Pollution Control (TDEC- APC) requested to update the method of delegations and continue the delegations of authority to implement and enforce National Emission Standards for Hazardous Air Pollutants (NESHAPs), and NESHAPs for Source Categories.
Docket EPA-R04-OAR-2024-0141, FRL-11846-01-R4FR Doc. 2024-13896
- Final rulePublished May 24, 202440 CFR 6140 CFR 63Approval of the Clean Air Act, Section 112(l), Authority for Hazardous Air Pollutants: Asbestos Management and Control; State of New Hampshire Department of Environmental Services
The Environmental Protection Agency (EPA) is granting the New Hampshire Department of Environmental Services (NH DES) the authority to implement and enforce the state's amended Asbestos Disposal Site Rule in place of the National Emission Standard for Asbestos provisions for inactive waste disposal sites. NH DES's amended rule applies to all inactive waste disposal sites that ceased operation on or before July 9, 1981. This approval makes the NH DES amended Asbestos Disposal Site Rule federally enforceable. This action is being taken under the Clean Air Act (CAA).
Effective Jun 24, 2024Docket EPA-R01-OAR-2022-0496, FRL-10522-02-R1FR Doc. 2024-11422
- Final rulePublished May 14, 202440 CFR 98Greenhouse Gas Reporting Rule: Revisions and Confidentiality Determinations for Petroleum and Natural Gas Systems
The Environmental Protection Agency (EPA) is amending requirements that apply to the petroleum and natural gas systems source category of the Greenhouse Gas Reporting Rule to ensure that reporting is based on empirical data, accurately reflects total methane emissions and waste emissions from applicable facilities, and allows owners and operators of applicable facilities to submit empirical emissions data that appropriately demonstrate the extent to which a charge is owed under the Waste Emissions Charge. The EPA is also amending certain requirements that apply to the general provisions, gener
Effective Jan 1, 2025Docket EPA-HQ-OAR-2023-0234, FRL-10246-02-OARFR Doc. 2024-08988
- Proposed rulePublished May 3, 202440 CFR 5140 CFR 52Prevention of Significant Deterioration (PSD) and Nonattainment New Source Review (NNSR): Regulations Related to Project Emissions Accounting
In this action, the Environmental Protection Agency (EPA) is proposing revisions to the preconstruction permitting regulations that apply to modifications at existing major stationary sources in the New Source Review (NSR) program under the Clean Air Act (CAA or Act). The proposed revisions include revising the definition of "project" in the NSR regulations, adding additional recordkeeping and reporting requirements applicable to minor modifications at existing major stationary sources, and proposing to require that decreases accounted for in the Step 1 significant emissions increase calculati
Comments close Jul 2, 2024Docket EPA-HQ-OAR-2022-0381, FRL-9249-01-OARFR Doc. 2024-04029
- Final rulePublished Apr 25, 202440 CFR 940 CFR 98Revisions and Confidentiality Determinations for Data Elements Under the Greenhouse Gas Reporting Rule
The EPA is amending specific provisions in the Greenhouse Gas Reporting Rule to improve data quality and consistency. This action updates the General Provisions to reflect revised global warming potentials; expands reporting to additional sectors; improves the calculation, recordkeeping, and reporting requirements by updating existing methodologies; improves data verifications; and provides for collection of additional data to better inform and be relevant to a wide variety of Clean Air Act provisions that the EPA carries out. This action adds greenhouse gas monitoring and reporting for five s
Effective Jan 1, 2025Docket EPA-HQ-OAR-2019-0424, FRL-7230-01-OARFR Doc. 2024-07413
- Proposed rulePublished Apr 15, 202440 CFR 50Public Hearing for the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen, Oxides of Sulfur, and Particulate Matter
The Environmental Protection Agency (EPA) is announcing that a virtual public hearing will be held for the proposed action titled, "Review of the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen, Oxides of Sulfur, and Particulate Matter" which is published elsewhere in this Federal Register. The hearing will be held on May 8, 2024. Based on the EPA's review of the ecological air quality criteria and the secondary national ambient air quality standards (NAAQS) for oxides of nitrogen (N oxides), oxides of sulfur (SO<INF>X</INF>), and particulate matter (PM), the EPA is pro
Docket EPA-HQ-OAR-2014-0128, FRL-5788-06-OARFR Doc. 2024-07960
- Proposed rulePublished Apr 15, 202440 CFR 50Review of the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen, Oxides of Sulfur, and Particulate Matter
Based on the Environmental Protection Agency's (EPA's) review of the air quality criteria and national ambient air quality standards (NAAQS) for oxides of nitrogen (N oxides), oxides of sulfur (SO<INF>X</INF>), and particulate matter (PM), the Environmental Protection Agency (EPA) proposes to revise the existing secondary sulfur dioxide (SO<INF>2</INF>) standard to an annual average, averaged over three consecutive years, with a level within the range from 10 to 15 parts per billion (ppb). Additionally, the Agency proposes to retain the existing secondary standards for N oxides and PM, without
Comments close Jun 14, 2024Docket EPA-HQ-OAR-2014-0128, FRL-5788-02-OARFR Doc. 2024-07397
- Final rulePublished Mar 6, 202440 CFR 5040 CFR 5340 CFR 58Reconsideration of the National Ambient Air Quality Standards for Particulate Matter
Based on the Environmental Protection Agency's (EPA's) reconsideration of the air quality criteria and the national ambient air quality standards (NAAQS) for particulate matter (PM), the EPA is revising the primary annual PM<INF>2.5</INF> standard by lowering the level from 12.0 [micro]g/m\3\ to 9.0 [micro]g/m\3\. The Agency is retaining the current primary 24-hour PM<INF>2.5</INF> standard and the primary 24-hour PM<INF>10</INF> standard. The Agency also is not changing the secondary 24-hour PM<INF>2.5</INF> standard, secondary annual PM<INF>2.5</INF> standard, and secondary 24-hour PM<INF>10
Effective May 6, 2024Docket EPA-HQ-OAR-2015-0072, FRL-8635-02-OARFR Doc. 2024-02637
- Proposed rulePublished Feb 26, 202440 CFR 7040 CFR 71Clarifying the Scope of “Applicable Requirements” Under State Operating Permit Programs and the Federal Operating Permit Program
On January 9, 2024, the Environmental Protection Agency (EPA) proposed a rule titled, "Clarifying the Scope of "Applicable Requirements" Under State Operating Permit Programs and the Federal Operating Permit Program." The EPA has received requests for additional time to review and comment on the proposed rule revisions. The EPA is extending the comment period on the proposed rule that was scheduled to close on March 11, 2024, by an additional 30 days, until April 10, 2024.
Effective Jan 9, 2024Comments close Apr 10, 2024Docket EPA-HQ-OAR-2023-0401, FRL-9118-03-OARFR Doc. 2024-03781
- Proposed rulePublished Jan 9, 202440 CFR 7040 CFR 71Clarifying the Scope of “Applicable Requirements” Under State Operating Permit Programs and the Federal Operating Permit Program
The Environmental Protection Agency (EPA) proposes to update its title V operating permit program regulations to more clearly reflect the EPA's existing interpretations and policies concerning when and whether "applicable requirements" established in other Clean Air Act (CAA or the Act) programs should be reviewed, modified, and/or implemented through the title V operating permits program. Specifically, this action clarifies the limited situations in which requirements under the New Source Review (NSR) preconstruction permitting program would be reviewed using the EPA's unique title V oversigh
Comments close Mar 11, 2024Docket EPA-HQ-OAR-2023-0401, FRL-9118-01-OARFR Doc. 2023-27759
- Final rulePublished Dec 12, 202340 CFR 6040 CFR 61Update to the Addresses and Agency Names for Region IX and Air Quality Agencies: Arizona; California; Hawaii; Nevada.
The Environmental Protection Agency (EPA) is amending its regulations to update addresses and names of air quality agencies in EPA Region IX. This action is editorial in nature and is intended to provide accuracy and clarity to EPA's regulations.
Effective Dec 12, 2023Docket EPA-R09-OAR-2023-0512, FRL-11463-01-R9FR Doc. 2023-27141
- Final rulePublished Oct 12, 202340 CFR 50Reference Measurement Principle and Calibration Procedure for the Measurement of Ozone in the Atmosphere (Chemiluminescence Method)
The Environmental Protection Agency (EPA) is finalizing an update to the current ozone absorption cross-section to the recommended consensus-based cross-section value of 1.1329x10<SUP>-17</SUP> cm\2\ molecule<SUP>-1</SUP> or 304.39 atm<SUP>-1</SUP> cm<SUP>-1</SUP>, with an uncertainty of 0.94 atm<SUP>-1</SUP> cm<SUP>-1</SUP>. The new value is 1.2% lower than the current value of 308 atm<SUP>-1</SUP> cm<SUP>-1</SUP> and reduces the uncertainty in the value to 0.31%. The adoption of this updated ozone absorption cross-section could result in increases in measured ozone concentrations but given t
Effective Nov 13, 2023Docket EPA-HQ-OAR-2022-0007, FRL-9344-02-OARFR Doc. 2023-22531
- Proposed rulePublished Aug 1, 202340 CFR 98Greenhouse Gas Reporting Rule: Revisions and Confidentiality Determinations for Petroleum and Natural Gas Systems
The Environmental Protection Agency (EPA) is proposing to amend requirements that apply to the petroleum and natural gas systems source category of the Greenhouse Gas Reporting Rule to ensure that reporting is based on empirical data, accurately reflects total methane emissions and waste emissions from applicable facilities, and allows owners and operators of applicable facilities to submit empirical emissions data that appropriately demonstrate the extent to which a charge is owed. The EPA is also proposing changes to requirements that apply to the general provisions, general stationary fuel
Comments close Oct 2, 2023Docket EPA-HQ-OAR-2023-0234, FRL-10246-01-OARFR Doc. 2023-14338
- Final rulePublished Jul 21, 202340 CFR 7040 CFR 71Removal of Title V Emergency Affirmative Defense Provisions From State Operating Permit Programs and Federal Operating Permit Program
The Environmental Protection Agency (EPA) is removing the "emergency" affirmative defense provisions from the EPA's title V operating permit program regulations. These provisions established an affirmative defense that sources could have asserted in enforcement cases brought for noncompliance with technology-based emission limitations in operating permits, provided that the exceedances occurred due to qualifying emergency circumstances. These provisions, which have never been required elements of state operating permit programs, are being removed because they are inconsistent with the EPA's in
Effective Aug 21, 2023Docket EPA-HQ-OAR-2016-0186, FRL-8961-02-OARFR Doc. 2023-15067
- Proposed rulePublished May 22, 202340 CFR 98Revisions and Confidentiality Determinations for Data Elements Under the Greenhouse Gas Reporting Rule
The EPA is issuing this supplemental proposal that would amend specific provisions in the Greenhouse Gas Reporting Rule to improve the quality and consistency of the rule by providing for the collection of improved data that would better inform and be relevant to a wide variety of Clean Air Act provisions that the EPA carries out. The EPA recently evaluated the requirements of the Greenhouse Gas Reporting Rule to identify areas of improvement, including updates to the existing calculation, recordkeeping, and reporting requirements, and requested information for collection of additional data to
Comments close Jul 21, 2023Docket EPA-HQ-OAR-2019-0424, FRL-7230-03-OARFR Doc. 2023-10047
- Proposed rulePublished Mar 15, 202340 CFR 50Release of Draft Policy Assessment for the Reconsideration of the Ozone National Ambient Air Quality Standards
On or about March 1, 2023, the Environmental Protection Agency (EPA) is making available to the public a revised draft document titled, Policy Assessment for the Reconsideration of the Ozone National Ambient Air Quality Standards, External Review Draft Version 2 (Draft PA). This draft document was prepared as a part of the current reconsideration of the 2020 final decision on the national ambient air quality standards (NAAQS) for ozone (O<INF>3</INF>). When final, the PA is intended to "bridge the gap" between the scientific and technical information assessed in the 2020 Integrated Science Ass
Comments close Apr 14, 2023Docket EPA-HQ-OAR-2018-0279, FRL-9545-04-OARFR Doc. 2023-05237
- Proposed rulePublished Feb 24, 202340 CFR 50Reference Measurement Principle and Calibration Procedure for the Measurement of Ozone in the Atmosphere (Chemiluminescence Method)
The Environmental Protection Agency (EPA) is proposing to update the current ozone absorption cross-section to the recommended consensus-based cross-section value of 1.1329x10<SUP>-</SUP>\17\ cm\2\ molecule<SUP>-</SUP>\1\ or 304.39 atm<SUP>-</SUP>\1\ cm<SUP>-</SUP>\1\, with an uncertainty of 0.94 atm<SUP>-</SUP>\1\ cm<SUP>-</SUP>\1\. The new value is 1.2% lower than the current value of 308 atm<SUP>-</SUP>\1\ cm<SUP>-</SUP>\1\, and reduces the uncertainty in the value to 0.31%. The adoption of this updated ozone absorption cross-section could result in increases in measured ozone concentration
Comments close Mar 27, 2023Docket EPA-HQ-OAR-2022-0007, FRL 9344-01-OARFR Doc. 2023-03578
- Proposed rulePublished Jan 31, 202340 CFR 50Public Hearing for the Reconsideration of the National Ambient Air Quality Standards for Particulate Matter
The Environmental Protection Agency (EPA) is announcing that a virtual public hearing will be held for the proposed action titled, "Reconsideration of the National Ambient Air Quality Standards for Particulate Matter," which was signed on January 5, 2023. The hearing will be held on Tuesday, February 21, 2023, and Wednesday, February 22, 2023. Based on the EPA's reconsideration of the air quality criteria and the national ambient air quality standards (NAAQS) for particulate matter (PM), the EPA proposes to revise the primary annual PM<INF>2.5</INF> standard by lowering the level. The Agency p
Comments close Mar 28, 2023Docket EPA-HQ-OAR-2015-0072, FRL-8635-05-OARFR Doc. 2023-01924
- Proposed rulePublished Jan 27, 202340 CFR 5040 CFR 5340 CFR 58Reconsideration of the National Ambient Air Quality Standards for Particulate Matter
Based on the Environmental Protection Agency's (EPA's) reconsideration of the air quality criteria and the national ambient air quality standards (NAAQS) for particulate matter (PM), the EPA proposes to revise the primary annual PM<INF>2.5</INF> standard by lowering the level. The Agency proposes to retain the current primary 24-hour PM<INF>2.5</INF> standard and the primary 24-hour PM<INF>10</INF> standard. The Agency also proposes not to change the secondary 24-hour PM<INF>2.5</INF> standard, secondary annual PM<INF>2.5</INF> standard, and secondary 24-hour PM<INF>10</INF> standard at this t
Comments close Mar 28, 2023Docket EPA-HQ-OAR-2015-0072, FRL-8635-01-OARFR Doc. 2023-00269
- Proposed rulePublished Jan 12, 202340 CFR 6140 CFR 63Approval of the Clean Air Act, Authority for Hazardous Air Pollutants: Asbestos Management and Control; State of New Hampshire Department of Environmental Services
The Environmental Protection Agency (EPA) is proposing to approve the amended "Env-Sw 2100: Management and Control of Asbestos Sites Not Operated after July 9, 1981," effective September 1, 2018 ("amended Asbestos Disposal Site Rule") in place of the National Emission Standard for Asbestos ("Asbestos NESHAP") provisions for inactive waste disposal sites not operated after July 9, 1981 submitted by the State of New Hampshire. The intended effect of this action is to propose approval of the amended Asbestos Disposal Site Rule in place of the Asbestos NESHAP provisions for inactive waste disposal
Comments close Feb 13, 2023Docket EPA-R01-OAR-2022-0496, FRL-10522-01-R1FR Doc. 2023-00112
- Final rulePublished Dec 5, 202240 CFR 61National Emissions Standards for Hazardous Air Pollutants; Delegation of Authority to Washington
The Environmental Protection Agency (EPA) is approving a delegation request submitted by the Washington State Department of Health (WDOH) for full delegation of authority to implement and enforce the National Emission Standards for Hazardous Air Pollutants for radionuclide air emissions.
Effective Jan 4, 2023Docket EPA-R10-OAR-2022-0374, FRL-9881-02-R10FR Doc. 2022-26343
- Final rulePublished Nov 9, 202240 CFR 6040 CFR 6140 CFR 63Delegation of New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants for the States of Arizona and California
The Environmental Protection Agency (EPA) is taking final action to approve updates to the Code of Federal Regulations delegation tables to reflect the current delegation status of New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants in Arizona and California.
Effective Dec 9, 2022Docket EPA-R09-OAR-2021-0962, FRL-9400-04-R9FR Doc. 2022-23977
- Final rulePublished Jul 21, 202240 CFR 6140 CFR 63National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to Oklahoma
The Oklahoma Department of Environmental Quality (ODEQ) has submitted updated regulations for receiving delegation and approval of its program for the implementation and enforcement of certain National Emission Standards for Hazardous Air Pollutants (NESHAP) for all sources (both part 70 and non-part 70 sources), as provided for under previously approved delegation mechanisms. The updated state regulations incorporate by reference certain NESHAP promulgated by the Environmental Protection Agency (EPA) at parts 61 and 63, as they existed through June 30, 2019. The EPA is providing notice that i
Effective Aug 22, 2022Docket EPA-R06-OAR-2020-0086, FRL-8847-02-R6FR Doc. 2022-15517
- Proposed rulePublished Jul 21, 202240 CFR 61National Emissions Standards for Hazardous Air Pollutants; Delegation of Authority to Washington
The Environmental Protection Agency (EPA) is proposing to fully approve a delegation request submitted by the Washington State Department of Health (WDOH) for full delegation of authority to implement and enforce the National Emission Standards for Hazardous Air Pollutants for radionuclide air emissions. The EPA granted WDOH partial delegation of authority to implement and enforce these standards effective July 5, 2006. The WDOH has addressed the partial approval issues, has updated its adoption of the applicable Federal standards to address all current Federal requirements, and has submitted
Comments close Aug 22, 2022Docket EPA-R10-OAR-2022-0374, FRL-9881-01-R10FR Doc. 2022-15553
- Proposed rulePublished Jul 19, 202240 CFR 940 CFR 98Revisions and Confidentiality Determinations for Data Elements Under the Greenhouse Gas Reporting Rule; Extension of Comment Period
On June 21, 2022, the Environmental Protection Agency (EPA) published a proposed rule titled "Revisions and Confidentiality Determinations for Data Elements Under the Greenhouse Gas Reporting Rule" (87 FR 36920). The EPA is extending the comment period for this proposed rule.
Effective Jun 21, 2022Comments close Oct 6, 2022Docket EPA-HQ-OAR-2019-0424, FRL-7230-04-OARFR Doc. 2022-15402
- Proposed rulePublished Jun 21, 202240 CFR 940 CFR 98Revisions and Confidentiality Determinations for Data Elements Under the Greenhouse Gas Reporting Rule
The Environmental Protection Agency (EPA) is proposing to amend specific provisions in the Greenhouse Gas Reporting Rule to improve the quality and consistency of the data collected under the rule, streamline and improve implementation, and clarify or propose minor updates to certain provisions that have been the subject of questions from reporting entities. These proposed changes include revisions to improve the existing calculation, recordkeeping, and reporting requirements by incorporating updates to existing emissions estimation methodologies and providing for collection of additional data
Comments close Aug 22, 2022Docket EPA-HQ-OAR-2019-0424, FRL-7230-02-OARFR Doc. 2022-09660
- Final rulePublished May 27, 202240 CFR 6040 CFR 6140 CFR 63Delegation of New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants for the States of Arizona and California
Because the Environmental Protection Agency (EPA) received public comment, which we intend to address, we are withdrawing the direct final rule for Delegation of New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants for the States of Arizona and California published on March 31, 2022. The EPA will take a final action on the proposed action in a separate subsequent final rulemaking.
Docket EPA-R09-OAR-2021-0962, FRL-9400-03-R9FR Doc. 2022-11461
- Final rulePublished May 18, 202240 CFR 6040 CFR 6140 CFR 6240 CFR 70Approval of Clean Air Act Operating Permit Program Revisions; Negative Declaration of Existing Hospital/Medical/Infectious Waste Incinerators and Administrative Updates; South Dakota
With this direct final rule, the Environmental Protection Agency (EPA or the "Agency") is promulgating approval of revisions to the South Dakota operating permit program for stationary sources under Clean Air Act (CAA) title V (the "title V program"), a Clean Air Act (CAA) section 111(d)/129 negative declaration for incinerators subject to the Hospital/Medical/Infectious Waste Incinerators (HMIWI) Emissions Guidelines, and making administrative updates. EPA is taking this final action in accordance with the CAA.
Effective Jul 18, 2022Comments close Jun 17, 2022Docket EPA-R08-OAR-2021-0732, FRL-9829-02-R8FR Doc. 2022-10224
- Proposed rulePublished May 18, 202240 CFR 6040 CFR 6140 CFR 6240 CFR 70Approval of Clean Air Act Operating Permit Program Revisions; Negative Declaration of Existing Hospital/Medical/Infectious Waste Incinerators and Administrative Updates; South Dakota
The Environmental Protection Agency (EPA or the "Agency") is proposing full approval of revisions to the South Dakota operating permit program for stationary sources under the Clean Air Act (CAA), title V (the "title V program") and a Clean Air Act (CAA) section 111(d)/129 negative declaration for incinerators subject to the Hospital/Medical/Infectious Waste Incinerators (HMIWI) Emissions Guidelines. EPA is proposing this action in accordance with the CAA.
Comments close Jun 17, 2022Docket EPA-R08-OAR-2021-0732, FRL-9829-01-R8FR Doc. 2022-10222
- Final rulePublished May 12, 202240 CFR 5040 CFR 51Identifying Additional Areas Subject to Mitigation Plan Requirements Under the 2016 Exceptional Events Rule: Notice of Availability
Notification is hereby given that the Environmental Protection Agency (EPA) has finalized a list of additional areas subject to the mitigation plan requirements found in the 2016 Exceptional Events Rule. This list is included within this document and is available on the Agency's website and in the electronic docket for this action. The EPA is separately notifying states with areas newly subject to these requirements. These notification letters are also available on the Agency's website and in the electronic docket for this action.
Docket EPA-HQ-OAR-2022-0313, FRL-9812-01-OARFR Doc. 2022-09748
- Proposed rulePublished Apr 1, 202240 CFR 7040 CFR 71Removal of Title V Emergency Affirmative Defense Provisions From State Operating Permit Programs and the Federal Operating Permit Program
The Environmental Protection Agency (EPA) is re-proposing a document, first proposed in 2016, which would remove the emergency affirmative defense provisions found in the regulations for state and federal operating permit programs under the Clean Air Act (CAA). The purpose of these provisions has been to establish an affirmative defense that sources can assert in civil enforcement cases when noncompliance with certain emission limitations in operating permits occurs because of qualifying "emergency" circumstances. These provisions, which have never been required elements of state operating per
Comments close May 16, 2022Docket EPA-HQ-OAR-2016-0186, FRL-8961-01-OARFR Doc. 2022-06907
- Final rulePublished Mar 31, 202240 CFR 6040 CFR 6140 CFR 63Delegation of New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants for the States of Arizona and California
The EPA is taking direct final action to update the Code of Federal Regulations delegation tables to reflect the current delegation status of New Source Performance Standards and National Emission Standards for Hazardous Air Pollutants in Arizona and California.
Effective May 31, 2022Comments close May 2, 2022Docket EPA-R09-OAR-2021-0962, FRL-9400-02-R9FR Doc. 2022-06279
- Final rulePublished Dec 31, 202040 CFR 50Review of the Ozone National Ambient Air Quality Standards
Based on the Environmental Protection Agency's (EPA's) review of the air quality criteria and the national ambient air quality standards (NAAQS) for photochemical oxidants including ozone (O<INF>3</INF>), the EPA is retaining the current standards, without revision.
Effective Dec 31, 2020Docket EPA-HQ-OAR-2018-0279, FRL-10019-04-OARFR Doc. 2020-28871
- Final rulePublished Dec 18, 202040 CFR 50Review of the National Ambient Air Quality Standards for Particulate Matter
Based on the Environmental Protection Agency's (EPA's) review of the air quality criteria and the national ambient air quality standards (NAAQS) for particulate matter (PM), the Administrator has reached final decisions on the primary and secondary PM NAAQS. With regard to the primary standards meant to protect against fine particle exposures (i.e., annual and 24-hour PM<INF>2.5</INF> standards), the primary standard meant to protect against coarse particle exposures (i.e., 24-hour PM<INF>10</INF> standard), and the secondary PM<INF>2.5</INF> and PM<INF>10</INF> standards, the EPA is retaining
Effective Dec 18, 2020Docket EPA-HQ-OAR-2015-0072, FRL-10018-11-OARFR Doc. 2020-27125
- Final rulePublished Aug 21, 202040 CFR 140 CFR 4940 CFR 7140 CFR 124Streamlining Procedures for Permit Appeals
The action finalizes a procedural rule to streamline and modernize the Environmental Protection Agency's (EPA) permit appeal process and ensure that appeals are decided consistent with the authority delegated from the Administrator by modifying existing procedural requirements and realigning prior delegations. This final procedural rule applies to permits issued by or on behalf of EPA under the Clean Air Act, the Clean Water Act, the Safe Drinking Water Act, and the Resources Conservation and Recovery Act.
Effective Sep 21, 2020Docket EPA-HQ-OGC-2019-0406, FRL 10012-97-OGCFR Doc. 2020-16257
- Proposed rulePublished Aug 14, 202040 CFR 50Review of the Ozone National Ambient Air Quality Standards
Based on the Environmental Protection Agency's (EPA's) review of the air quality criteria and the national ambient air quality standards (NAAQS) for photochemical oxidants including ozone (O<INF>3</INF>), the EPA is proposing to retain the current standards, without revision.
Comments close Oct 1, 2020Docket EPA-HQ-OAR-2018-0279, FRL-10012-49-OARFR Doc. 2020-15453
- Proposed rulePublished Dec 3, 201940 CFR 140 CFR 2240 CFR 2340 CFR 4940 CFR 5240 CFR 5540 CFR 7140 CFR 7840 CFR 12440 CFR 222Modernizing the Administrative Exhaustion Requirement for Permitting Decisions and Streamlining Procedures for Permit Appeals
The Environmental Protection Agency (EPA) proposes a procedural rule intended to streamline and modernize part of the Agency's permitting process by creating a new, time-limited alternative dispute resolution process (ADR process) as a precondition to judicial review. Under this proposal, the parties in the ADR process may agree by unanimous consent to either extend the ADR process or proceed with an appeal before the Environmental Appeals Board (EAB). If the parties don't agree to proceed with either the ADR process or an EAB appeal, the permit would become final and could be challenged in fe
Comments close Jan 2, 2020Docket EPA-HQ-OGC-2019-0406, FRL-10002-10-OGCFR Doc. 2019-24940
- Proposed rulePublished Nov 6, 201940 CFR 5140 CFR 5240 CFR 7040 CFR 71Prevention of Significant Deterioration, Nonattainment New Source Review, and Title V: Treatment of Corn Milling Facilities Under the “Major Emitting Facility” Definition; Reconsideration
On March 2, 2009, the Natural Resource Defense Council (NRDC) submitted a petition for reconsideration (the NRDC Petition) of the rule "Prevention of Significant Deterioration, Nonattainment New Source Review and Title V: Treatment of Certain Ethanol Production Facilities Under the `Major Emitting Facility' Definition" (the Ethanol Rule), published in the Federal Register on May 1, 2007. The Ethanol Rule reinterpreted the component term "chemical process plants" within the statutory definition of "major emitting facility" and regulatory definitions of "major stationary source" under the Preven
Docket EPA-HQ-OAR-2006-0089, FRL-10001-61-OARFR Doc. 2019-23711
- Proposed rulePublished Nov 18, 201640 CFR 5140 CFR 5240 CFR 6040 CFR 7040 CFR 71Revisions to the Prevention of Significant Deterioration (PSD) and Title V Greenhouse Gas (GHG) Permitting Regulations and Establishment of a Significant Emissions Rate (SER) for GHG Emissions Under the PSD Program
On August 26, 2016, the Environmental Protection Agency (EPA) issued a proposed rule to revise provisions in the Prevention of Significant Deterioration (PSD) and title V permitting regulations applicable to greenhouse gases (GHGs) to fully conform with recent court decisions. The EPA is extending the comment period on this proposed rule that was scheduled to close on December 2, 2016. The EPA received a letter requesting the extension of the proposed rule public comment period to allow the public additional time to review the rule and supporting documentation.
Effective Oct 3, 2016Comments close Dec 16, 2016Docket EPA-HQ-OAR-2015-0355, FRL-9955-14-OARFR Doc. 2016-27670
- Final rulePublished Oct 18, 201640 CFR 5140 CFR 5240 CFR 5540 CFR 7040 CFR 7140 CFR 124Revisions to Public Notice Provisions in Clean Air Act Permitting Programs
The U.S. Environmental Protection Agency (EPA) is revising the public notice rule provisions for the New Source Review (NSR), title V and Outer Continental Shelf (OCS) permit programs of the Clean Air Act (CAA or Act) and corresponding onshore area (COA) determinations for implementation of the OCS air quality regulations. This final rule removes the mandatory requirement to provide public notice of a draft air permit (as well as certain other program actions) through publication in a newspaper. Instead, this final rule requires electronic notice (e-notice) for EPA actions (and actions by perm
Effective Nov 17, 2016Docket EPA-HQ-OAR-2015-0090, FRL-9954-10-OARFR Doc. 2016-24911
- Proposed rulePublished Oct 3, 201640 CFR 5140 CFR 5240 CFR 6040 CFR 7040 CFR 71Revisions to the Prevention of Significant Deterioration (PSD) and Title V Greenhouse Gas (GHG) Permitting Regulations and Establishment of a Significant Emissions Rate (SER) for GHG Emissions Under the PSD Program
The Environmental Protection Agency (EPA) is proposing to revise provisions applicable to greenhouse gases (GHG) in the EPA's Prevention of Significant Deterioration (PSD) and title V permitting regulations. This action is in response to the June 23, 2014, U.S. Supreme Court's decision in Utility Air Regulatory Group (UARG) v. EPA and the April 10, 2015, Amended Judgment by the United States Court of Appeals for the District of Columbia Circuit (D.C. Circuit) in Coalition for Responsible Regulation v. EPA. The proposed PSD and title V revisions involve changes to several regulatory definitions
Comments close Dec 2, 2016Docket EPA-HQ-OAR-2015-0355, FRL-9951-79-OARFR Doc. 2016-21475
- Proposed rulePublished Jun 14, 201640 CFR 7040 CFR 71Removal of Title V Emergency Affirmative Defense Provisions From State Operating Permit Programs and Federal Operating Permit Program
The Environmental Protection Agency (EPA) is proposing to remove the affirmative defense provisions for emergencies found in the regulations for state and federal operating permit programs. These provisions establish an affirmative defense that sources can assert in civil enforcement cases when noncompliance with certain emission limitations in operating permits occurs because of qualifying "emergency" circumstances. These provisions, which have never been required elements of state operating permit programs, are being removed because they are inconsistent with the enforcement structure of the
Comments close Aug 15, 2016Docket EPA-HQ-OAR-2016-0186, FRL-9947-56-OARFR Doc. 2016-14104
- Final rulePublished Jun 3, 201640 CFR 5140 CFR 5240 CFR 7040 CFR 71Source Determination for Certain Emission Units in the Oil and Natural Gas Sector
The U.S. Environmental Protection Agency (EPA) is finalizing a revision to regulations applicable to permitting of stationary sources of air pollution under the New Source Review (NSR) and title V programs in the Clean Air Act (CAA or Act). For sources in the oil and natural gas sector, this rule clarifies the meaning of the term "adjacent" that is used to determine the scope of a "stationary source" for purposes of the Prevention of Significant Deterioration (PSD) and Nonattainment NSR (NNSR) preconstruction permitting programs and the scope of a "major source" in the title V operating permit
Effective Aug 2, 2016Docket EPA-HQ-OAR-2013-0685, FRL-9946-55-OARFR Doc. 2016-11968
Search the Federal Register by program
- New Source Performance Standards: 40 CFR 60
- Hazardous air pollutant standards: 40 CFR 61
- State implementation plans and state plans: 40 CFR 52
- Title V operating permit programs: 40 CFR 70
- Implementation plan requirements, including NSR: 40 CFR 51
- Ambient standards and area designations: 40 CFR 50
- Greenhouse Gas Reporting Program: 40 CFR 98
AirPermitHub provides educational, engineering, research, and compliance-support information. Information provided by the platform does not constitute legal advice and should not replace review of applicable regulations, permits, agency guidance, or consultation with qualified professionals. Full disclaimer