Region
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Cleveland
3
Coachella Valley
1
Cochituate, Lake
1
Coeur d'Alene River, South Fork
1
Coeur d'Alene River, South Fork (Idaho)
1
Collingwood (Vic.)
1
Colombia
5
Colorado
50
Colorado Plateau
1
Colorado River (Colo.-Mexico)
2
Colorado River Valley (Colo.-Mexico)
1
Colorado River Watershed
3
Colorado River Watershed (Colo.-Mexico)
3
Columbia Aquifer
1
Columbia Plateau
1
Columbia River
3
Columbia River Region
1
Columbia River Watershed
1
Columbus Region
1
Connecticut
11
Connecticut River Watershed
2
Conowingo Dam (Md.)
1
Covington
1
Croatia
1
Cumberland River (Ky. and Tenn.)
1
Curtis Bay
1
Curtis Bay (Md.)
1
Dale County Region
1
Dallas Region
1
Dane County
1
Deer Trail
1
Dehli
1
Delaware
4
Delaware River
1
Delaware River Watershed (N.Y.-Del. and N.J.)
2
Delmarva Peninsula
2
Delta
2
Denmark
2
Denver
2
Denver Region
4
Developed countries
1
Developing countries
9
Diamond (La.)
1
Dickson County
1
Donora
1
Douglas County
1
Dover Air Force Base
1
Dover Air Force Base (Del.)
1
Dover Region
4
Duck River Basin
1
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