Resources
Guides, articles, templates and tools for air permitting professionals. Every guide cites its sources and points to the governing text.
- Which air permit do I need? Where to startA practical sequence for any new or changing facility: jurisdiction, inventory, potential to emit, authorization options, federal standards, and operating permits.Air Permitting8 min read
- Potential to emit, explained for engineersWhat PTE is, how it differs from actual emissions, why enforceable limits matter, and how to document the calculation.Emission Calculations9 min read
- PSD vs. Nonattainment NSR vs. minor NSRHow the three preconstruction programs divide the work, what each one requires, and how area designations decide which applies.Federal Regulations8 min read
- Texas Air Permitting GuideTexas Commission on Environmental Quality (TCEQ): De minimis facilities, Permits by Rule (PBR), Standard Permits, and more.Reviewed 2026-10-25
- New Mexico Air Permitting GuideNew Mexico Environment Department (NMED): No permit required, Notice of Intent (NOI), Minor Source Construction Permit (Part 72), and more.Reviewed 2026-10-25
- Facility Equipment InventoryOne row per emission unit, with the identifiers and design data permit applications and calculations ask for.AirPermitHub TemplateCSV
- Which air permit do I need? Where to startA practical sequence for any new or changing facility: jurisdiction, inventory, potential to emit, authorization options, federal standards, and operating permits.Air Permitting8 min read
- Potential to emit, explained for engineersWhat PTE is, how it differs from actual emissions, why enforceable limits matter, and how to document the calculation.Emission Calculations9 min read
- PSD vs. Nonattainment NSR vs. minor NSRHow the three preconstruction programs divide the work, what each one requires, and how area designations decide which applies.Federal Regulations8 min read
- Title V operating permits: what they requireWho needs a Title V permit, what goes in it, and the monitoring, reporting, and certification obligations that follow.Compliance9 min read
State guides
- Texas Air Permitting GuideTexas Commission on Environmental Quality (TCEQ): De minimis facilities, Permits by Rule (PBR), Standard Permits, and more.Reviewed 2026-10-25
- New Mexico Air Permitting GuideNew Mexico Environment Department (NMED): No permit required, Notice of Intent (NOI), Minor Source Construction Permit (Part 72), and more.Reviewed 2026-10-25
- Oklahoma Air Permitting GuideOklahoma Department of Environmental Quality (DEQ): Permit exempt facilities, Permits by Rule (PBR), General Permits, and more.Reviewed 2026-10-25
- Colorado Air Permitting GuideColorado Department of Public Health and Environment (CDPHE): APEN and permit exemptions, Air Pollutant Emission Notice (APEN), Construction Permit, and more.Reviewed 2026-10-25
- Louisiana Air Permitting GuideLouisiana Department of Environmental Quality (LDEQ): No permit required (Act 547 / R.S. 30:2054(B)(2)(b)(ix)), Small Source Exemption, Insignificant Activities, and more.Reviewed 2026-10-25
- North Dakota Air Permitting GuideNorth Dakota Department of Environmental Quality (NDDEQ): Exempt sources, Minor Source Permit to Construct and Permit to Operate, Synthetic Minor PTC and PTO, and more.Reviewed 2026-10-25
In production
How to read a Title V permit
Where applicable requirements, monitoring, and reporting obligations live in a typical operating permit.
PlannedNavigating NSPS subparts by equipment
Using equipment type and construction dates to narrow which Part 60 subparts deserve a closer look.
PlannedStorage tank emission methods compared
Working, breathing, and flash losses, and how method choice and inputs change results.
PlannedBuilding a compliance calendar from permit conditions
Turning permit terms into tracked tasks with owners, due dates, and evidence.
PlannedTexas air authorization options overview
How PBRs, standard permits, and NSR permits fit together in the TCEQ program.
PlannedCareer paths in air quality engineering
Roles, skills, and certifications across consulting, industry, and agencies.
Planned
- Facility Equipment InventoryOne row per emission unit, with the identifiers and design data permit applications and calculations ask for.AirPermitHub TemplateCSV
- Engine InventoryStationary engine data used for NSPS/NESHAP screening and emission calculations.AirPermitHub TemplateCSV
- Tank InventoryStorage vessel data for throughput, vapor pressure, and control tracking.AirPermitHub TemplateCSV
- Emission Calculation WorkbookA calculation log that records every input, factor, and source, matching the AirPermitHub calculator export.AirPermitHub TemplateCSV
- Permit Condition TrackerTurn each permit condition into an owned, dated obligation with evidence.AirPermitHub TemplateCSV
- Compliance CalendarDated tasks across facilities, ready to sort, filter, or import into a calendar.AirPermitHub TemplateCSV
- Deviation LogRecord deviations, causes, corrective actions, and reporting status.AirPermitHub TemplateCSV
- Flare Tracking LogTrack flaring events, volumes, and pilot monitoring.AirPermitHub TemplateCSV
- Regulatory Applicability MatrixDocument, unit by unit, why each candidate rule does or does not apply, with citations.AirPermitHub TemplateCSV
- Air Permit Application ChecklistA working checklist from jurisdiction through submittal. Pair it with the agency's own application instructions.AirPermitHub TemplateCSV
- Facility Inspection Readiness ChecklistPrepare records and the site for an agency inspection.AirPermitHub TemplateCSV
- New Equipment Change ChecklistRun before installing or modifying equipment so permitting is not an afterthought.AirPermitHub TemplateCSV
No webinars scheduled yet
Training sessions will be announced here and in the newsletter. Recordings will be posted with their slides and sources.
White papers in production
Longer technical papers will be published here once they have been reviewed against their sources.
Is AirPermitHub legal or regulatory advice?
No. AirPermitHub provides educational, engineering, and research information. Screening results point to programs worth reviewing; the agency's rules and interpretations govern, and a qualified professional should confirm decisions.
Where does the state information come from?
Each state hub is researched from the state air agency's own website and rules. Every hub shows its sources, its last-reviewed date, and whether it is verified or partially verified.
Why don't the calculators include emission factors?
Emission factors change and depend on the source, fuel, and revision. Until the versioned factor library launches, you enter the factor and its source so every result is traceable. Demo values exist only to explore the interface and are flagged.
Does the Permit Finder tell me which permit I need?
It screens for potentially applicable programs and lists what information is still needed. It never concludes that a permit is or is not required.
Are the templates official government forms?
No. AirPermitHub templates are our own working files. Use the agency's official forms, linked in the Permit Library, for any submittal.
Are the job listings and permit records real?
Not yet. Job listings, companies, and permit records shown today are labeled demo data that preview features launching with accounts.
How do I report an error?
Use the Contact page and include the page address and the source that shows the correct information. Corrections are reviewed against the official source.