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
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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.
For More Information
Fletcher Clover (clover.fletcher@epa.gov)
Regional Maps (Arizona, California, Guam, Hawaii and Nevada)
- Lead (Pb) Attainment Designations in Region 9
- California Air Basins and Counties in EPA Region 9
- Carbon Monoxide (CO) Attainment Designations
- Class I Federal Lands (Parks, Wilderness Areas, etc.)
- Native American Tribal Lands and Reservations Web Version | (PDF) (1 pg, map, 146K)
- Nitrogen Dioxide (NO2) Attainment Designations
- Ozone (O3) Attainment Designations (2008 8-hour standard)
- Ozone (O3) Attainment Designations (1997 8-hour standard)
- Ozone (O3) Attainment Designations (1-hour standard)
- 24-Hour Particulate Matter (24-Hour PM-2.5) Attainment Designations
- Annual Particulate Matter (PM-2.5) Attainment Designations
- Particulate Matter (PM-10) Attainment Designations
- Sulfur Dioxide (SO2) Attainment Designations
- 2009-2011 Sulfur Dioxide (SO2) Monitoring Site Design Values in Region 9
Arizona Maps
- Class I Federal Lands (Parks, Wilderness Areas, etc.)
- Native American Tribal Lands and Reservations Web Version | (PDF) (1 pg, map, 210K)
California Maps
- Air Pollution Control District Boundaries and County Lines
- Class I Federal Lands (Parks, Wilderness Areas, etc.)
- Native American Tribal Lands and Reservations Web Version | (PDF) (1 pg, map, 305K)
Nevada Maps
- Class I Federal Lands (Parks, Wilderness Areas, etc.)
- Native American Tribal Lands and Reservations Web Version | (PDF) (1 pg, map, 189K)
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