Approved Air Quality Implementation Plans in Region 9
Arizona, California, Hawaii, Nevada, Pacific Islands, and Tribal Nations
Approved State Implementation Plans (SIPs), Tribal Implementation Plans (TIPs), and Federal Implementation Plans (FIPs) within EPA Region 9 states and territories listed above.
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.
- Gila River Indian Community
- Navajo Nation
- Pechanga Band of Luiseño Mission Indians of the Pechanga Reservation
- Salt River Pima-Maricopa Indian Community