Jump to main content or area navigation.

Contact Region 9

Pacific Southwest, Region 9

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

You are here: EPA Home
Pacific Southwest
Air
Quality Analysis
Trends
Sulfur Dioxide

Air Quality Analysis

Air Quality Trends

Air Quality Trends Home

Carbon Monoxide (CO)

2008 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 (1973-2018)

Sulfur Dioxide Concentrations

National Annual Standard
Annual Average Concentration

View a larger version of this map (PNG, 179K)
View a high resolution PDF of this map (PDF) (1 pg, 42K)

(Click Graph to Enlarge)

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

Area Navigation

About EPA Region 9 (Pacific Southwest)

Jump to main content.