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Worst Air Quality (% of Good Days)

Palm Springs 25%
Chandler 29%
Paradise Valley 29%
Henderson 43%
Greenville 46%
Columbia 47%
Las Cruces 52%
Chapel Hill 52%
Park City 55%
Newport Beach 57%
Cambridge 59%
Athens 64%
Ann Arbor 64%
Lynchburg 68%
South Lake Tahoe 68%