Northern America: Pollution Index by City 2014 Mid-Year

Chart: Pollution Index
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Rank
City
Pollution Index
Exp Pollution Index
Baltimore, MD, United States 76.2 135.9
Phoenix, AZ, United States 72.5 131.9
Windsor, Canada 65.4 114.6
Houston, TX, United States 64.5 120.1
Los Angeles, CA, United States 61.9 108.0
Salt Lake City, UT, United States 60.3 114.8
Detroit, MI, United States 54.7 112.9
San Jose, CA, United States 53.4 93.3
Philadelphia, PA, United States 51.2 92.3
New York, NY, United States 50.7 90.7
Miami, FL, United States 46.6 82.3
Reno, NV, United States 46.6 80.5
Sacramento, CA, United States 44.7 81.3
Austin, TX, United States 44.2 89.8
Columbus, OH, United States 43.7 72.5
Montreal, Canada 40.3 66.6
Kelowna, Canada 39.8 66.7
Orlando, FL, United States 39.7 72.1
Toronto, Canada 39.4 64.2
Denver, CO, United States 39.1 71.5
San Francisco, CA, United States 38.4 69.4
San Diego, CA, United States 38.0 71.9
Halifax, Canada 37.2 64.8
Winnipeg, Canada 36.8 62.5
Abbotsford, Canada 35.2 63.6
Quebec City, Canada 33.1 62.2
Chicago, IL, United States 31.9 59.1
Washington, DC, United States 30.7 56.2
Boston, MA, United States 28.4 51.7
Edmonton, Canada 27.5 46.6
Seattle, WA, United States 26.6 49.0
Brampton, Canada 26.4 42.9
Minneapolis, MN, United States 25.2 39.4
Vancouver, Canada 24.1 42.5
London, Canada 23.3 55.0
Portland, OR, United States 20.3 35.6
Ottawa, Canada 19.5 35.4
Calgary, Canada 19.4 34.0
Honolulu, HI, United States 17.7 32.9
Victoria, Canada 14.6 32.3