Pacific Southwest, Region 9
Serving: Arizona, California, Hawaii, Nevada, Pacific Islands, Tribal Nations
Air Quality Analysis
Air Quality Trends
2008 Lead (Pb) National Standard
Nitrogen Dioxide (NO2)
24-Hour Fine Particulate Matter (PM2.5)
Air Quality Trends (1970-2018)
Nitrogen Dioxide Concentrations
National Annual Standard
Highest Annual Mean Concentration
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