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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

Air Quality Trends (1985-2017)

Particulate Matter (PM10) Estimated Exceedance days

Three-year average of the number of estimated exceedance days per year

Graph showing air pollution concentrations for particulate matter (PM 1.0) - Click for readable PDF

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