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Approved Air Quality Implementation Plans in Region 9

Arizona, California, Hawaii, Nevada, the 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.

To better serve you, some of the information on this topic is being moved to new web pages. We appreciate your patience during this transition.

In the interim, please contact Kevin Gong ( at (415) 972-3073 with any questions related to Region 9’s Air Quality Implementation Plans.

Tribal Implementation Plans