Jump to main content or area navigation.

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 (2000-2012)

24-Hour Fine Particulate Matter (PM2.5) Concentrations

Three-year average of third-highest daily values

Graph showing air pollution concentrations for particulate matter (PM 2.5) - Click for readable PDF

Jump to main content.