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Contact EPA Pacific Southwest Air Program

Pacific Southwest, Region 9

Serving: Arizona, California, Hawaii, Nevada, Pacific Islands, Tribal Nations

Air Quality Analysis

EPA Region 9 Air Quality Maps and Geographic Information

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Below are links to air quality maps from EPA Region 9 (Arizona, California, Hawaii, and Nevada, and tribal lands in the Pacific Southwest). These maps provide information such as the level of air quality in specific areas, the borders of local air permitting agencies, and the location of specially protected federal lands.

Under Section 301(d) of the federal Clean Air Act, the EPA is authorized to treat Indian tribes as states. As such, Indian tribes do not fall under the permitting authority of state or local agencies. Instead, EPA retains permitting authority for all sources of air pollution that are located on tribal lands. However, EPA is developing regulations that will enable the transfer permitting authority to tribal governments on a case-by-case basis.

Regional Maps (Arizona, California, Guam, Hawaii and Nevada)

Arizona Maps

California Maps

Nevada Maps

For More Information

Fletcher Clover (clover.fletcher@epa.gov)

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