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Pacific Southwest, Region 9

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

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Pacific Southwest
Air
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Particulate Matter (PM 2.5)

Air Quality Analysis

Air Quality Trends

Air Quality Trends Home

Carbon Monoxide (CO)

2008 Lead (Pb) National Standard

1978 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 (2000-2012)

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 for readable PDF

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