Best & Worst Cities for Ozone Pollution

Best and Worst Cities For Ozone Pollution Infographic

This information has been reviewed and approved by the American Lung Association, 2019.


Summary: Best and Worst Cities for Ozone Pollution


Cleanest Ozone Cities (in alphabetical order)

  1. Anchorage, AK
  2. Bangor, ME
  3. Bismarck, ND
  4. Bowling Green, KY
  5. Brownsville, TX
  6. Brunswick, GA
  7. Burlington, VT
  8. Casper, WY
  9. Clarksville, TN
  10. Corpus Christi, TX
  11. Crestview, FL
  12. Dothan, AL
  13. Duluth, MN
  14. Fairbanks, AK
  15. Fargo, ND
  16. Fayetteville, NC
  17. Fayetteville, AR
  18. Florence, SC
  19. Fort Smith, AR
  20. Gadsden, AL
  21. Hickory, NC
  22. Thibodaux, LA
  23. Jackson, MS
  24. Joplin, MO
  25. La Crosse, WI
  26. Laredo, TX
  27. Lincoln, NE
  28. Longview, TX
  29. McAllen, TX
  30. Missoula, MT
  31. Monroe, LA
  32. Morgantown, WV
  33. Myrtle Beach, SC
  34. New Bern, NC
  35. Panama City, FL
  36. Rapid City, SD
  37. Roanoke, VA
  38. Rochester, MN
  39. Rocky Mount, NC
  40. Salinas, CA
  41. Savannah, GA
  42. Scottsboro, AL
  43. Shreveport, LA
  44. Springfield, MO
  45. Tallahassee, FL
  46. Topeka, KS
  47. Tupelo, MS
  48. Honolulu, HI
  49. Wausau, WI
  50. Wilmington, NC


Most Ozone Polluted Cities

  1. Los Angeles, CA
  2. Visalia, CA
  3. Bakersfield, CA
  4. Fresno, CA
  5. Sacramento, CA
  6. San Diego, CA
  7. Phoenix, AZ
  8. San Jose, CA
  9. Las Vegas, NV
  10. Denver, CO
  11. Salt Lake City, UT
  12. New York, NY
  13. Redding, CA
  14. Houston, TX
  15. El Centro, CA
  16. Chicago, IL
  17. El Paso, TX
  18. Chico, CA
  19. Fort Collins, CO
  20. Washington, DC
  21. Dallas, TX
  22. Sheboygan, WI
  23. Philadelphia, PA
  24. Milwaukee, WI
  25. Hartford, CT
Source: American Lung Association 2020


What is Ozone Pollution?

Bad or ground-level ozone pollution is created when vehicle and other emissions mix with pollutants and are heated by the sun. Warmer weather increases ground-level ozone pollution.


Protect Your Lungs from Ozone Pollution

  • Watch local air quality advisories.
  • Stay indoors as much as possible and when ozone/pollution levels are high.
  • Keep windows closed.
  • Take medications exactly as prescribed.
  • Use the circulate setting on your home thermostat to keep polluted air out.
  • Exercise or be outside in the morning when ozone levels are lowest.
  • Call your doctor if symptoms increase or if you need more medication.
Facemasks are highly encouraged to limit COVID-19 infection, but provide no protection against ozone.

This information has been reviewed and approved by Anthony Gerber, MD (July 2020) 


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