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  1. Home
  2. Air Quality Implementation Plans

Approved Air Quality Implementation Plans in Region 6

Louisiana, Arkansas, Oklahoma, New Mexico, Texas and Tribal Nations

Use the links below to find approved State Implementation Plans (SIPs), Tribal Implementation Plans (TIPs), and Federal Implementation Plans (FIPs) within EPA's Region 6.

Resources

Region 6 Federal Air Quality Control Regions (AQCRs)

State Implementation Plans

Arkansas

  • EPA Approved Regulations in the Arkansas SIP
    • Arkansas Read Me
    • Arkansas SIP History
    • Previous Arkansas SIP-Approved Regulations
  • EPA Approved Arkansas Source-Specific Requirements
  • EPA Approved Nonregulatory Provisions and Quasi-Regulatory Measures in the Arkansas SIP

Louisiana

  • EPA Approved Regulations in the Louisiana SIP
    • Louisiana Read Me
    • Louisiana SIP History
    • Louisiana Register Citations in the Louisiana SIP-Approved Rule
    • Previous Louisiana SIP-Approved Regulations
  • EPA Approved Louisiana Source-Specific Requirements
  • EPA Approved Nonregulatory Provisions and Quasi-Regulatory Measures in the Louisiana SIP

New Mexico

  • EPA Approved New Mexico State-Wide Regulations in the New Mexico SIP
  • EPA Approved New Mexico Albuquerque/Bernalillo County Regulations in the New Mexico SIP
    • New Mexico Read Me
    • New Mexico SIP History
    • Previous Albuquerque/Bernalillo County SIP Approved Regulations
    • Previous New Mexico State-Wide SIP Approved Regulations
  • EPA Approved New Mexico Source-Specific Requirements
  • EPA Approved Nonregulatory Provisions and Quasi-Regulatory Measures in the New Mexico SIP

Oklahoma

  • EPA Approved Regulations in the Oklahoma SIP
    • Oklahoma Read Me
    • Oklahoma SIP History
    • Previous Oklahoma SIP-Approved Regulations
  • EPA Approved Oklahoma Source-Specific Requirements
  • EPA Approved Nonregulatory Provisions and Quasi-Regulatory Measures in the Oklahoma SIP

Texas

  • EPA Approved Regulations in the Texas SIP
    • Texas Read Me
    • Texas SIP History
    • Previous Texas SIP-Approved Regulations
  • EPA Approved Texas Source-Specific Requirements
  • EPA Approved Nonregulatory Provisions and Quasi-Regulatory Measures in the Texas SIP

Tribal Implementation Plans

Region 6 currently has no TIPs.

Federal Implementation Plans

State Location of Official SIP/FIPs in
40 CFR Part 52 (if applicable)
Location in Electronic Code of Federal Regulations

AR

Subpart E

Link to the eCFR for 40 CFR Part 52 Subpart E.
After link opens, click on “View table of contents for this page.”

LA

Subpart T

Link to the eCFR for 40 CFR Part 52 Subpart T.
After link opens, click on “View table of contents for this page.”

NM

Subpart GG

Link to the eCFR for 40 CFR Part 52 Subpart GG.
After link opens, click on “View table of contents for this page.”

OK

Subpart LL

Link to the eCFR for 40 CFR Part 52 Subpart LL.
After link opens, click on “View table of contents for this page.”

TX

Subpart SS

Link to the eCFR for 40 CFR Part 52 Subpart SS.
After link opens, click on “View table of contents for this page.”

Air Quality Implementation Plans

  • About Air Quality Implementation Plans
  • Approved Air Quality Implementation Plans
  • Develop an Air Quality SIP
  • Find a Regional Contact for Air Quality SIPs/FIPS/TIPs
  • Tools for SIP Status
Contact Us about Air Quality Implementation Plans
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on April 2, 2025
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