Region
California
31
Colorado
17
Nevada
15
Florida
13
Arizona
12
New York (State)
12
Washington (State)
9
New Mexico
8
Utah
8
Illinois
7
Ohio
7
South Dakota
7
Texas
7
Wyoming
7
Idaho
6
Iowa
6
Massachusetts
6
Oklahoma
6
United States
6
Georgia
5
High Plains Aquifer
5
Minnesota
5
Oregon
5
Columbia Plateau
4
Missouri
4
Nebraska
4
New Jersey
4
Pennsylvania
4
Santa Clara River Valley
4
South Carolina
4
West Virginia
4
Bedrock Region
3
Black Mesa (Navajo County and Apache County)
3
Dolores River (Colo. and Utah)
3
Louisiana
3
Miami-Dade County
3
Michigan
3
Riverside County
3
Salt Lake County
3
San Bernardino County
3
San Francisco Bay Area
3
Snake River Plain (Idaho and Or.)
3
Southern States
3
Albany
2
Black Mesa Region (Navajo County and Apache County)
2
Branson Region
2
Brown County
2
Cannon Air Force Base
2
Cape Cod
2
Champlain, Lake, Watershed
2
more ...