Region
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Cedar River Watershed (Minn. and Iowa)
1
Central Oklahoma Aquifer
1
Charleston Region
1
Chattahoochee River National Recreation Area
1
Chattahoochee River National Recreation Area (Ga.)
1
Chesapeake Bay Watershed
1
China
1
Chukchi Sea
1
Citizen Potawatomi Nation, Oklahoma
1
Clark County
1
Coffee County
1
Columbus
1
Cooper River
1
Corinna
1
Cortland County
1
Dayton Metropolitan Area
1
Dayton Region
1
Death Valley (Calif. and Nev.)
1
Deer Flat National Wildlife Refuge (Idaho and Or.)
1
Doña Ana County
1
East (U.S.)
1
Edwards Aquifer
1
Edwards Aquifer (Tex.)
1
El Paso County
1
Elkhart County
1
Erlangen
1
Ethiopia
1
Europe
1
Everglades
1
Fargo
1
Fire Island National Seashore
1
Flint River Watershed
1
Fort Polk
1
Fort Polk (La.)
1
Fort Totten Indian Reservation
1
Fort Wainwright
1
Fort Worth
1
Fort Worth Region
1
Franklin County
1
Fridley
1
Grapevine Canyon (Calif. and Nev.)
1
Great Plains
1
Gulf Coast (U.S.)
1
Gulf of Mexico
1
Hanford
1
Hanford Site
1
Hayward
1
Hindu Kush-Himalayan Region
1
Hixson Region
1
Houston, Lake (Tex.)
1
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