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  • Air Quality Implementation Plans
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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.

  • American Samoa
  • Arizona
  • California
  • Commonwealth of the Northern Mariana Islands
  • Guam
  • Hawaii
  • Nevada

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

Federal Implementation Plans (FIPs)

Navajo Nation - Navajo Generating Station

  • Federal Register: Final Rule
  • Rulemaking Docket

Hawaii Regional Haze

  • Federal Register: Final Rule
  • Rulemaking Docket

Air Quality Notices in the Federal Register

    View All Recent Air Quality Notices in the Federal Register
    Contact Us to ask a question, provide feedback, or report a problem.
    Last updated on April 7, 2022
    United States Environmental Protection Agency

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