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  1. Home
  2. Permitting Under the Clean Air Act

CAA Permitting Tools & ​Related Resources

Policy & Guidance

  • NSR Workshop Manual (DRAFT October 1990) (pdf) (1.2 MB)
  • NSR, Title V & Title V Petition Search
  • Applicability Determinations Index
  • Technical Air Pollution Resources
  • New Source Review (P&G)
  • Title V (P&G)
  • Title V Petitions Database
  • Search All Air Permit P&G and Petition Databases

Databases

  • RACT-BACT-LAER Clearinghouse
  • AP-42
  • AirData
  • Applicability Determination Index (ADI)
  • CAMD Data & Maps
  • Envirofacts
  • Greenhouse Gas Data
  • Integrated Risk Information System (IRIS)
  • Toxics Release Inventory

Other Resources

  • Clean Air Act
  • e-CFR
  • Federal Register
  • SIC Codes
  • NAICS Codes
  • EPA Control Cost Manual
  • NEPIS

Rule References

New Source Review Permits

  • Tribal Minor Source Review
    • 40 CFR 49.151 - 49.173
  • State NSR Program, including Minor Source Review
    • 40 CFR 51.160-166
  • State Nonattainment NSR Program
    • 40 CFR 51.165
  • State PSD Program
    • 40 CFR 51.166
  • Federal PSD Program
    • 40 CFR 52.21
  • Emission Offset Interpretative Ruling
    • 40 CFR Part 51, Appendix S
  • Federal Procedures for Decisionmaking
    • 40 CFR Part 124

Operating Permits

  • Compliance Assurance Monitoring
    • 40 CFR Part 64
  • State Operating Permit Programs
    • 40 CFR Part 70
  • Federal Operating Permit Programs
    • 40 CFR Part 71
  • Title IV Acid Rain Permits
    • 40 CFR Part 72

Outer Continental Shelf Permits

  • 40 CFR Part 55

Permitting Under the Clean Air Act

  • Clean Air Act Permitting Around the Nation
    • New England Region (R1)
    • New York, New Jersey, Puerto Rico and U.S. Virgin Islands (R2)
    • Mid-Atlantic Region (R3)
    • Southeastern Region (R4)
    • Great Lakes Region (R5)
    • South Central Region (R6)
    • Midwest Region (R7)
    • Mountains and Plains Region (R8)
    • Pacific Southwest Region (R9)
      • About PSD Permitting in Region 9
      • Air Permit Delegation and PSD SIP Approval Status in Region 9
      • About NSR Permitting in Region 9
      • About Title V Permitting in Region 9
      • Electronic Permit System and Dashboards
      • Pending and Completed Permit Actions
      • Clean Air Act Permitting in Arizona
      • Clean Air Act Permitting in California
      • Clean Air Act Permitting in Hawai'i and Pacific Islands
      • Clean Air Act Permitting in Nevada
    • Pacific Northwest Region (R10)
  • CAA Permitting Tools & ​Related Resources
  • Outer Continental Shelf Air Permits
Contact Us About Permitting Under the Clean Air Act
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on May 8, 2025
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