Region
Colorado
65
New Mexico
37
Nevada
28
California
26
Florida
26
Montana
24
Texas
17
New York (State)
16
Oregon
16
Minnesota
15
South Dakota
15
Utah
15
Washington (State)
15
Kansas
14
Hawaii
13
United States
12
Arizona
11
Illinois
11
North Carolina
11
North Dakota
11
Pennsylvania
11
Tennessee
10
Floridan Aquifer
9
South Carolina
9
Wyoming
9
Maryland
8
Nebraska
8
Alabama
7
Georgia
7
Indiana
7
Nye County
7
Wisconsin
7
Arkansas
6
Kentucky
5
Middle West
5
Oklahoma
5
Willamette River Valley
5
Arkansas River Valley
4
Columbia Plateau
4
Idaho
4
India
4
Lincoln County
4
Louisiana
4
Massachusetts
4
Michigan
4
Missouri
4
New Hampshire
4
Powder River Basin (Wyo. and Mont.)
4
Sarasota County
4
Virginia
4
more ...