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Approved Air Quality Implementation Plans in Region 9

Arizona, California, Hawaii, Nevada, Pacific Islands, and Tribal Nations

Use the tabs below to find 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

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.