Region
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Nevada
3
New Mexico
1
New York (State)
1
Nickajack Trace (Murfreesboro, Tenn.)
1
North America
3
North Carolina
1
North Slope
1
North Slope (Alaska)
1
Northeastern States
1
Northwest, Pacific
1
Oakland Spring (Murfreesboro, Tenn.)
1
Ohio
2
Oregon
2
Phoenix
1
Pilbara (W.A.)
1
Pima County
1
Pitchfork Ranch
1
Pitchfork Ranch (N.M.)
1
Prince William Sound
1
Prince William Sound (Alaska)
1
Puget Sound
2
Puget Sound (Wash.)
2
Rio Grande Watershed (Colo.-Mexico and Tex.)
1
Russia (Federation)
1
Rutherford County
1
Saint Bernard Parish
1
Saint Bernard Parish (La.)
1
Saint Louis River (Minn. and Wis.)
1
Saint Vincent National Wildlife Refuge
1
Saint Vincent National Wildlife Refuge (Fla.)
1
Salt River (Gila County and Maricopa County, Ariz.)
1
Salton Sea
6
Salton Sea (Calif.)
6
San Francisco Bay
5
San Francisco Bay (Calif.)
1
Santa Cruz River (Ariz. and Mexico)
1
Santa Rosa County
1
Santa Rosa County (Fla.)
1
Savannah River Site
1
Scotland
1
Sierra National Forest
1
South Carolina
2
Southern Uplands
1
Southwestern States
1
Spain
1
Spring Mountains National Recreation Area
1
Spring Mountains National Recreation Area (Nev.)
1
Sutter Basin
1
Sutter Basin (Calif.)
1
Tahoe, Lake (Calif. and Nev.)
4
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