Most Polluted Cities
Click on a city below to learn more about its ranking
By Ozone
- Los Angeles-Long Beach-Riverside, CA
- Visalia-Porterville, CA
- Bakersfield-Delano, CA
- Fresno-Madera, CA
- Hanford-Corcoran, CA
- Sacramento--Arden-Arcade--Yuba City, CA-NV
- San Diego-Carlsbad-San Marcos, CA
- Houston-Baytown-Huntsville, TX
- San Luis Obispo-Paso Robles, CA
- Merced, CA
- Modesto, CA
- Dallas-Fort Worth, TX
- Washington-Baltimore-Northern Virginia, DC-MD-VA-WV
- El Centro, CA
- New York-Newark-Bridgeport, NY-NJ-CT-PA
- Chico, CA
- Philadelphia-Camden-Vineland, PA-NJ-DE-MD
- Charlotte-Gastonia-Salisbury, NC-SC
- Phoenix-Mesa-Glendale, AZ
- Pittsburgh-New Castle, PA
- Birmingham-Hoover-Cullman, AL
- Cincinnati-Middletown-Wilmington, OH-KY-IN
- Stockton, CA
- Baton Rouge-Pierre Part, LA
- Atlanta-Sandy Springs-Gainesville, GA-AL
By Year Round Particle Pollution
- Bakersfield-Delano, CA
- Fresno-Madera, CA
- Hanford-Corcoran, CA
- Los Angeles-Long Beach-Riverside, CA
- Modesto, CA
- Pittsburgh-New Castle, PA
- Salt Lake City-Ogden-Clearfield, UT
- Logan, UT-ID
- Fairbanks, AK
- Merced, CA
- Provo-Orem, UT
- Visalia-Porterville, CA
- Eugene-Springfield, OR
- Green Bay, WI
- Stockton, CA
- Las Cruces, NM
- Harrisburg-Carlisle-Lebanon, PA
- San Diego-Carlsbad-San Marcos, CA
- Chicago-Naperville-Michigan City, IL-IN-WI
- Milwaukee-Racine-Waukesha, WI
- Sacramento--Arden-Arcade--Yuba City, CA-NV
- Philadelphia-Camden-Vineland, PA-NJ-DE-MD
- Davenport-Moline-Rock Island, IA-IL
- Washington-Baltimore-Northern Virginia, DC-MD-VA-WV
- Yakima, WA
By Short-Term Particle Pollution
- Bakersfield-Delano, CA
- Hanford-Corcoran, CA
- Los Angeles-Long Beach-Riverside, CA
- Visalia-Porterville, CA
- Fresno-Madera, CA
- Pittsburgh-New Castle, PA
- Phoenix-Mesa-Glendale, AZ
- Cincinnati-Middletown-Wilmington, OH-KY-IN
- Louisville-Jefferson County-Elizabethtown-Scottsburg, KY-IN
- Philadelphia-Camden-Vineland, PA-NJ-DE-MD
- St. Louis-St. Charles-Farmington, MO-IL
- Steubenville-Weirton, OH-WV
- Birmingham-Hoover-Cullman, AL
- Fairbanks, AK
- Indianapolis-Anderson-Columbus, IN
- Cleveland-Akron-Elyria, OH
- Columbus-Auburn-Opelika, GA-AL
- Dayton-Springfield-Greenville, OH
- Charleston, WV
- Wheeling, WV-OH
- Parkersburg-Marietta, WV-OH
- Huntington-Ashland, WV-KY-OH
- Houston-Baytown-Huntsville, TX
- Davenport-Moline-Rock Island, IA-IL
- Fairmont-Clarksburg, WV
FACT: 18.5 million Americans live in counties where the outdoor air failed all three tests covered in the State of the Air report.
