Approved Air Quality Implementation Plans in EPA's Pacific Southwest (Region 9)
Arizona, California, Hawaii, Nevada, Pacific Islands, and Tribal Nations
EPA approved State Implementation Plans (SIPs), Tribal Implementation Plans (TIPs), and Federal Implementation Plans (FIPs) within EPA Region 9 states and territories.
The official SIPs, TIPs, and FIPs are contained in regulations promulgated in the Federal Register and codified in the U.S. Code of Federal Regulations (CFR). EPA’s web-versions of the approved SIPs, TIPs, and FIPs are for reference. While we make every effort to maintain the accuracy of the files accessible here, inconsistencies may occur. If you find any errors in these files, or experience a problem reading a document with assistive technology, please contact us.
- State Implementation Plans (SIPs)
- Tribal Implementation Plans (TIPs)
- Federal Implementation Plans (FIPs)
State Implementation Plans (SIPs)
Region 9 Air Plan Actions include federal action on SIPs to make them federally enforceable. SIPs may contain rules or regulations which control pollution from stationary, area, or mobile sources.
American Samoa
Arizona
- State-Wide Regulations
- State-Wide Statutes
- Regulations for Maricopa County
- Regulations for Pima County
- Regulations for Pinal County
- Arizona Source-Specific Requirements
- Nonregulatory Provisions and Quasi-Regulatory Measures
California
- Statewide Regulations and Statutes
- Test Procedures, Test Methods, and Specifications
- Local Jurisdiction Ordinances and Municipal Code
- EPA-Approved Source-Specific Requirements
- Amador County APCD
- Antelope Valley AQMD
- Bay Area AQMD
- Butte County AQMD
- Calaveras County APCD
- Colusa County APCD
- Eastern Kern County APCD
- El Dorado County AQMD
- Feather River AQMD
- Glenn County APCD
- Great Basin Unified APCD
- Imperial County APCD
- Lake County AQMD
- Lassen County APCD
- Mariposa County APCD
- Mendocino County AQMD
- Modoc County APCD
- Mojave Desert AQMD
- Monterey Bay Unified APCD
- North Coast Unified AQMD
- Northern Sierra AQMD
- Northern Sonoma APCD
- Placer County APCD
- Sacramento Metropolitan AQMD
- San Diego County APCD
- San Joaquin Valley Unified APCD
- San Luis Obispo County APCD
- Santa Barbara County APCD
- Shasta County AQMD
- Siskiyou County APCD
- South Coast AQMD
- Tehama County APCD
- Tuolumne County APCD
- Ventura County APCD
- Yolo-Solano AQMD
Commonwealth of the Northern Mariana Islands
Guam
Hawai'i
- Regulations
- Source-Specific Requirements (None at this time)
- Nonregulatory Provisions and Quasi-Regulatory Measures
Nevada
- State-Wide Statutes and Regulations
- Clark County
- Lander County
- Washoe County
- EPA Approved Source-Specific Requirements (None at this time)
- Nonregulatory Provisions and Quasi-Regulatory Measures
Tribal Implementation Plans (TIPs)
- Gila River Indian Community
- Navajo Nation
- Pechanga Band of Luiseño Mission Indians of the Pechanga Reservation
- Salt River Pima-Maricopa Indian Community