Region
Florida
22
New York (State)
22
New Mexico
21
California
20
Nevada
17
Tennessee
15
Utah
15
Arizona
14
Minnesota
13
Colorado
12
Texas
12
Washington (State)
12
New Hampshire
11
North Carolina
11
Louisiana
9
Pennsylvania
9
Oregon
8
San Juan Basin (N.M. and Colo.)
8
United States
8
Virginia
8
Illinois
7
Micronesia
7
Micronesia (Federated States)
7
Montana
7
New Jersey
7
Hawaii
6
Ohio
6
Alabama
5
American Samoa
5
Floridan Aquifer
5
Long Island
5
Massachusetts
5
Nebraska
5
South Dakota
5
West Virginia
5
Wyoming
5
El Paso County
4
Gloucester County
4
Idaho
4
Michigan
4
Nassau County
4
Northern Mariana Islands
4
Nye County
4
Pinellas County
4
Puerto Rico
4
Rhode Island
4
Saipan
4
Tutuila Island
4
York County
4
Albuquerque
3
more ...