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Worst Water Quality (% of Watershed Classified as "Impaired")

Casper 100%
Concord 100%
Kingston 100%
Rochester 100%
Carolina Beach 100%
Lake Placid 100%
Boise 96%
Great Falls 94%
Monterey 93%
Valdosta 93%
Coeur d'Alene 92%
Pocatello 91%
Bishop 87%
Middleton 84%
Athens 83%