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Pacific Southwest, Region 9

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

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Pacific Southwest
Air
Quality Analysis
Trends
Nitrogen Dioxide Concentrations

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 (1970-2012)

Nitrogen Dioxide Concentrations

National Annual Standard
Highest Annual Mean Concentration

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Graph showing air pollution concentrations for nitrogen dioxide -Click for readable PDF

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