Region
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Canadian-American Border Region
2
Cannonsville Reservoir Watershed
1
Cannonsville Reservoir Watershed (N.Y.)
1
Canon City
1
Cap-Rouge (Québec)
1
Cape Cod
3
Cape Cod Bay (Mass.)
1
Cape Cod National Seashore
1
Cape Cod National Seashore (Mass.)
1
Cape Fear River Estuary
1
Caribbean Area
1
Carroll County
1
Carson River Valley
1
Carson River Watershed
2
Carson River, East Fork (Calif. and Nev.)
1
Carson River, West Fork (Calif. and Nev.)
1
Cary
1
Cascade Range
1
Caspian Sea Region
1
Cass Lake
1
Cauca River
1
Cedar Falls
1
Central Valley
1
Champlain, Lake
5
Charles River
2
Chattahoochee River
2
Chattahoochee River National Recreation Area
1
Chattahoochee River National Recreation Area (Ga.)
1
Chattanooga Region
1
Cheli͡abinsk
1
Cheney Reservoir Watershed
1
Cherokee County
1
Cherry Valley
1
Chesapeake Bay
1
Chesapeake Bay (Md. and Va.)
21
Chesapeake Bay Region (Md. and Va.)
2
Chesapeake Bay Watershed
16
Chesapeake Bay Watershed (Md. and Va.)
1
Chesapeake and Ohio Canal National Historical Park
2
Cheshire (Ohio : Township)
1
Chester County
1
Chicago
3
Chicago Metropolitan Area
1
Chile
2
Chilton County
1
China
49
Chittenden County
1
Choptank River
1
Choptank River (Del. and Md.)
1
Chornobyl
1
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