Region
Colorado
98
United States
64
California
36
Texas
19
Florida
18
Alaska
14
Wisconsin
14
Kansas
12
New York (State)
12
New Jersey
11
Louisiana
10
Michigan
8
Nevada
8
Oregon
8
Utah
8
Arkansas
7
Colorado River Watershed (Colo.-Mexico)
7
Idaho
7
New Mexico
7
Pennsylvania
7
Arizona
6
Chesapeake Bay Watershed
6
Delaware River Watershed (N.Y.-Del. and N.J.)
6
Minnesota
6
Chesapeake Bay (Md. and Va.)
5
Clark Fork Watershed (Mont. and Idaho)
5
Colorado River (Colo.-Mexico)
5
High Plains Aquifer
5
Montana
5
Ohio
5
Wyoming
5
Yukon River Watershed (Yukon and Alaska)
5
Coeur d'Alene River Watershed
4
Illinois
4
Johnson County
4
Nebraska
4
South Dakota
4
Virginia
4
West (U.S.)
4
Alabama
3
Connecticut
3
Delaware
3
Georgia
3
Grand Portage Reservation
3
Great Lakes (North America)
3
Hawaii
3
Houston, Lake
3
Indiana
3
Iowa
3
Jefferson County
3
more ...