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.
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.
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