Region
Colorado
256
United States
120
West (U.S.)
52
California
51
Nebraska
30
Nevada
29
Montana
28
New Mexico
28
Idaho
27
Wyoming
27
Oregon
24
Washington (State)
24
South Dakota
20
Arkansas
19
Ute Mountain Indian Reservation
18
Kansas
14
Utah
14
Florida
13
Southern Ute Indian Reservation
13
Texas
13
Arizona
11
North Dakota
11
Southern Ute Indian Reservation (Colo.)
10
Klamath River Watershed (Or. and Calif.)
9
Churchill County
8
Colorado River Watershed (Colo.-Mexico)
8
Grand Valley (Colo. and Utah)
8
India
7
Missouri River Watershed
7
Northwest, Pacific
7
South Platte River Watershed (Colo. and Neb.)
7
Colorado River (Colo.-Mexico)
6
High Plains Aquifer
6
Michigan
6
Natrona County
6
Northport Irrigation District (Neb.)
6
Rio Grande (Colo.-Mexico and Tex.)
6
San Luis Valley (Colo. and N.M.)
6
Fremont-Madison Irrigation District (Idaho)
5
Georgia
5
High Plains (U.S.)
5
Minnesota
5
Ogallala Aquifer
5
Pakistan
5
Puerto Rico
5
Salton Sea
5
San Juan River Watershed (Colo.-Utah)
5
Central Valley (Valley)
4
Columbia Plateau
4
Columbia River
4
more ...