Region
Colorado River (Colo.-Mexico)
104
Colorado River Watershed (Colo.-Mexico)
12
Colorado
10
Colorado River Valley (Colo.-Mexico)
10
United States
10
Southwest, New
9
Arizona
7
Grand Canyon (Ariz.)
7
West (U.S.)
6
Grand Valley (Colo. and Utah)
3
Mexico
3
Rio Grande (Colo.-Mexico and Tex.)
3
Tijuana River (Mexico and Calif.)
3
California
2
Colorado River Region (Colo.-Mexico)
2
Glen Canyon Dam (Ariz.)
2
Grand Canyon
2
Green River (Wyo.-Utah)
2
Gunnison River
2
Arkansas River
1
Colorado Plateau
1
Colorado River Delta (Mexico)
1
Four Corners Region
1
Fryingpan River (Colo.)
1
Glen Canyon National Recreation Area (Utah and Ariz.)
1
Glen Canyon Region (Utah and Ariz.)
1
Grand Canyon National Park
1
Grand Canyon National Park (Ariz.)
1
Grand Junction
1
Green River (Utah)
1
Gunnison River basin unit
1
Lower Gunnison Basin unit
1
Mead, Lake (Ariz. and Nev.)
1
Mesa County
1
Navajo Indian Reservation
1
Powell, Lake (Utah and Ariz.)
1
Rocky Mountains
1
Southwestern States
1
Upper Colorado River Watershed
1
Utah
1
Vernal (Utah)
1
Wyoming
1