Most and least polluted cities in the United States in 2008
Cities that had the most declared unhealthy air days by EPA standards and all cities with no days when the amount of pollutants in the air was considered to be unhealthy.
Total Locations:
No. 2
Los Angeles, CA
Clean air
Fargo, ND
No days of unhealthy air in the last year, according to the EPA.
Clean air
Colorado Springs, CO
No days of unhealthy air in the last year, according to the EPA.
No. 19
Indianapolis, IN
No. 12
Provo, UT
No. 11
Eugene, OR
No. 3
Fresno, CA
Clean air
Santa Fe, NM
No days of unhealthy air in the last year, according to the EPA.
Clean air
Pueblo, CO
No days of unhealthy air in the last year, according to the EPA.
Clean air
Flagstaff, AZ
No days of unhealthy air in the last year, according to the EPA.
Clean air
Farmington, NM
No days of unhealthy air in the last year, according to the EPA.
Clean air
Corpus Christi, TX
No days of unhealthy air in the last year, according to the EPA.
No. 18
Hanford, CA
No. 16
San Jose, CA
No. 13
Chicago, IL
No. 9
Detroit, MI
No. 7
Salt Lake City, UT
Clean air
Sioux Falls, SD
No days of unhealthy air in the last year, according to the EPA.
Clean air
Salinas, CA
No days of unhealthy air in the last year, according to the EPA.
Clean air
Longview, TX
No days of unhealthy air in the last year, according to the EPA.
Clean air
Amarillo, TX
No days of unhealthy air in the last year, according to the EPA.
No. 17
Fairbanks, AK
No. 6
Logan, UT
No. 4
Bakersfield, CA
Sacramento, CA
Clean air
Santa Barbara, CA
No days of unhealthy air in the last year, according to the EPA.
Clean air
San Luis Obispo, CA
No days of unhealthy air in the last year, according to the EPA.
No. 20
Visalia, CA
Clean air
Alexandria, LA
No days of unhealthy air in the past year, according to the EPA.
Clean air
Bismarck, ND
No days of unhealthy air in the last year, according to the EPA.
Clean air
Redding, CA
No days of unhealthy air in the last year, according to the EPA.
Clean air
Fort Collins, CO
No days of unhealthy air in the last year, according to the EPA.
No. 15
Cleveland, OH
Clean air
Midland, TX
No days of unhealthy air in the last year, according to the EPA.
C
Great Falls, MT
No days of unhealthy air in the last year, according to the EPA.
Clean air
Cheyenne, WY
No days of unhealthy air in the last year, according to the EPA.
No. 14
New York, NY
No. 5
Birmingham, AL
No. 1
Pittsburg, PA
The most polluted U.S. city according to the EPA.
No. 10
Washington, DC
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