Top 10 Most Polluted Places in the USA

Salt Lake City, Utah - Winter inversion, PM2.5, ozone

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Most Polluted Places in the USA

9. Sacramento-Roseville, California - Ozone, PM2.5

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Most Polluted Places in the USA

8. Denver-Aurora, Colorado - Ozone pollution, particulate matter

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Most Polluted Places in the USA

7. Fairbanks, Alaska - PM2.5 from wood-burning in winter

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Most Polluted Places in the USA

6. San Diego-Chula Vista, California - High ozone

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Most Polluted Places in the USA

5. Phoenix-Mesa, Arizona - Ozone pollution

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Most Polluted Places in the USA

4. Los Angeles-Long Beach, California - Ozone pollution, PM2.5

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Most Polluted Places in the USA

3. Visalia, California - High ozone and PM2.5

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Most Polluted Places in the USA

2. Fresno-Madera-Hanford, California - High PM2.5 and ozone concentrations

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Most Polluted Places in the USA

1. Bakersfield, California - High levels of PM2.5 and ozone

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Most Polluted Places in the USA