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
2008 Lead (Pb) National Standard
1978 Lead (Pb) National Standard
24-Hour Fine Particulate Matter (PM2.5)
Annual Fine Particulate Matter (PM2.5)
Annual Sulphur Dioxide (SO2)
Air Quality Trends (1970-2012)
Sulfur Dioxide Concentrations
National Annual Standard
Annual Average Concentration
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