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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

Region 9 GeoViewer Air Division Mapping Application
Region 9 Air Quality Mapping Application 

The EPA Region 9 Air Division Mapping Application (ADMA) displays public air quality information and provides access to 26 primary datasets and 47 unique layers.

On this page:

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.

The data in the air quality maps below can be further explored in the Region 9 Air Quality Mapping Application  along with regional air quality monitor information.

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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