Region
Colorado
78
New Mexico
46
Arizona
39
New York (State)
38
Florida
36
Nevada
34
California
32
Montana
25
Utah
25
Texas
24
Minnesota
20
Oregon
18
Mississippi
16
Washington (State)
16
Kansas
15
North Carolina
15
Oklahoma
15
South Dakota
15
United States
15
Hawaii
14
Louisiana
13
Wyoming
13
Alabama
12
Floridan Aquifer
12
Pennsylvania
12
Illinois
11
North Dakota
11
South Carolina
11
Tennessee
11
Arkansas
10
High Plains Aquifer
10
Idaho
10
Nebraska
10
Georgia
9
Maryland
8
Wisconsin
8
Indiana
7
Nye County
7
Oswego County
7
Columbia Plateau
6
Kentucky
6
Maricopa County
6
Massachusetts
6
Colorado River Watershed (Colo.-Mexico)
5
Middle West
5
Missouri
5
Navajo County
5
New Hampshire
5
Puerto Rico
5
Southern States
5
more ...