top polluted us cities rankings

U.S. Cities Ranked by Air Pollution

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Rank U.S. Cities Ranked by Air Pollution Average Annual Mean PM-10 Concentration (ug/m³)
1 Fresno – Madera, CA 69.2
2 Bakersfield, CA 66.8
3 Visalia – Porterville – Hanford, CA 64.9
4 Modesto – Merced – Stockton , CA 63.4
5 Los Angeles – Long Beach, CA 60.1
6 San Jose – San Francisco – Oakland, CA 58.8
7 Salt Lake City – Provo – Orem, UT 58.4
8 Logan, UT – ID 55.9
9 Fairbanks, AK 52.3
10 Pittsburgh – New Castle – Weirton, PA 50.5
11 Cleveland – Akron – Canton, OH 49.4
12 Riverside, CA 48.1
13 Phoenix, AZ 39.5
14 Spokane, WA 38.7
15 Reno, NV 38.5
16 Las Vegas, NV 38.3
17 Anaheim, CA 38.1
18 Medford, OR 37.9
19 St. Joseph, MO 37.6
20 Yuba City, CA 37.4
21 Steubenville, OH 36.6
22 Omaha, NE 35.5
23 Atlanta, GA 35.1
24 Chattanooga, TN 34.9
25 Paterson, NJ 34.8
26 San Diego, CA 34.8
27 Boise City, ID 34.0
28 Chicago, IL 33.7
29 Roanoke, VA 33.7
30 Philadelphia, PA 33.5
31 Detroit, MI 33.2
32 Yakima, WA 33.1
33 Chico, CA 33.1
34 Decatur, IL 33.0
35 Waterloo, IA 33.0
36 Knoxville, TN 32.6
37 Nashville, TN 32.4
38 Atlantic City, NJ 32.4
39 Laredo, TX 32.4
40 Houston, TX 31.9
41 Sacramento, CA 31.9
42 St. Louis, MO 31.8
43 Las Cruces, NM 31.7
44 Gadsden, AL 31.7
45 Mobile, AL 31.4
46 Newark, NJ 31.4
47 Providence, RI 31.4
48 Huntington, WV 31.4
49 Hamilton, OH 31.3
50 Lancaster, PA 31.0
  Top 10 Most Ozone Polluted Cities Air Quality Index (101-150)
1 Los Angeles – Long Beach, CA 133
2 Visalia – Porterville – Hanford, CA 131
3 Bakersfield, CA 129
4 Fresno – Madera, CA 128
5 Sacramento = Roseville, CA 128
6 Houston – The Woodlands, TX 122
7 Dallas – Fort Worth, TX 121
8 Modesto – Merced – Stockton , CA 117
9 Las Vegas – Henderson, NV 114
10 Phoenix – Mesa – Scottsdale, AZ 113
Rank Top 10 Cleanest Cities Average Annual Mean PM-10 Concentration (ug/m³)
1 Prescott, AZ 5.4
2 Farmington, NM 5.8
3 Cheyenne, WY 6.1
3 Casper, WY 6.1
5 Flagstaff, AZ 6.8
5 Duluth, MN - WI 6.8
6 Salinas, CA 7.5
6 Palm Bay - Melbourne - Titusville, FL 7.5
6 Kahului - Wailuku - Lahaina, HI 7.5
10 Rapid CIty - Spearfish, SD 8.3
10 Anchorage, AK 8.3
10 Bismarck, ND 8.3
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PM10 represents particles in the air that we consider pollution. These particles might be smoke, dirt, mold, pollen etc. PM10 are the larger course particles that are kicked up into the air and spread around causing severe health effects. PM2.5 represents fine particles such as toxic compounds and heavy metals caused by fires and metal smelting. Below is a list of where each country ranks by PM10 measured in the air.

Statistic Verification
Source: World Health Organization, American Lung Association
Research Date: October 18th, 2015

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