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Contact Region 9

Pacific Southwest, Region 9

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

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Pacific Southwest
Air
Quality Analysis
Trends
Particulate Matter (PM 2.5)

Air Quality Analysis

Air Quality Trends

Air Quality Trends Home

Carbon Monoxide (CO)

2008 Lead (Pb) National Standard

Nitrogen Dioxide (NO₂)

8-Hour Ozone (O₃)

24-Hour Fine Particulate Matter (PM2.5)

Annual Fine Particulate Matter (PM2.5)

Particulate Matter (PM10)

24-Hour Sulphur Dioxide (SO₂)

Annual Sulphur Dioxide (SO₂)

Air Quality Trends (2001-2018)

24-Hour Fine Particulate Matter (PM2.5) Concentrations

Three-year Average of Third-highest Daily Values

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Graph showing air pollution concentrations for particulate matter (PM 2.5) - Click to Enlarge

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About EPA Region 9 (Pacific Southwest)

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