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.
State Implementation Plans
Arkansas
- Arkansas Recodified EPA SIP Approved Regulations SIP effective February 25, 2026—OUTLINE
- Arkansas EPA SIP Approved Regulations SIP effective TO February 24, 2026
- 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
- 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
- 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
- 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
- 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.” |