Dirtiest Fine Particulate Matter Month by US County

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92 percent of the population breathes air with harmful levels of pollutants, that’s why 100 thousand Americans die every year from air pollution.

Main sources of air pollution from particulate matter involve the ineffective use of energy by houses, vehicles, manufacturing, and farming.

PM2.5 particles include pollutants, such as nitrates, sulfate and black carbon.

The most-polluted metropolitan areas by the average year-round concentration of PM2.5

1. Fresno-Madera-Hanford (California)
2. Bakersfield (California)
3. Fairbanks (Arkansas)
4. Visalia (California)
5. Los Angeles-Long Beach (California)
6. San Jose-San Francisco-Oakland (California)
7. Pittsburgh-New Castle-Weirton (Pennsylvania, Ohio, West Virginia)
8. El Centro (California)
9. Cleveland-Akron-Canton (Ohio)
10. Medford-Grants Pass (Oregon)