Region
Alabama
1
Alaska
2
Anacostia River Watershed (Md. and Washington, D.C.)
1
Apalachicola River
1
Arizona
5
Arkansas
11
Arkansas River Valley
1
Arnold Air Force Base
1
Arthur R. Marshall Loxahatchee National Wildlife Refuge
1
Atchafalaya River
1
Atlantic Coast
3
Atlantic Coast (New England)
1
Atlantic Coast (U.S.)
4
Atlantic Coastal Watershed
1
Atlantic Ocean
1
Australia
1
Beaver Lake
1
Beaver Lake (Ark.)
1
Becker County
1
Belvidere
1
Biscayne Aquifer (Fla.)
1
Black Mesa (Navajo County and Apache County)
1
Brazoria County Groundwater Conservation District (Tex.)
1
Brunswick
1
California
13
Canaveral, Cape (Fla. : Cape)
1
Cape Canaveral
1
Cape May County
1
Carpinteria Region
1
Casco Bay
1
Castle Lake (Cowlitz County)
1
Catskill Mountains
1
Chandeleur Islands
1
Charles County
1
Chehalis River Watershed
1
Chester County
1
Churchill County
1
Cochiti Dam
1
Cochituate, Lake
1
Colorado
3
Colorado River
1
Colorado River (Colo.-Mexico)
2
Columbia Plateau
1
Columbia River Watershed
2
Connecticut
1
Cook Inlet
1
Crystal Lake
1
Dauphin Island
1
Death Valley (Calif. and Nev.)
1
Delaware
1
more ...