Region
Colorado
2
South Dakota
2
Washington (State)
2
Altus, Lake, Watershed (Okla. and Tex.)
1
California
1
California, Southern
1
Churchill County
1
Columbia River
1
Dolores Region
1
Freezeout Lake
1
Georgia
1
Great Plains
1
Montana
1
Nevada
1
Salton Sea
1
Salton Sea (Calif.)
1
Salton Sea Region
1
Uintah and Ouray Indian Reservation
1
United States
1
Utah
1
Wyoming
1