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Contact EPA Pacific Southwest

Pacific Southwest, Region 9

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

Air Quality Analysis

Air Quality Trends (1973-2018)

Sulfur Dioxide Concentrations

National 24-hour Standard
Second Highest 24-hour Average Concentration

(Click Graph to Enlarge)
Graph showing air pollution concentrations for sulfur dioxide - Click to Enlarge
 

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