Region
United States
22
New York (State)
9
California
8
Florida
8
Texas
8
Wyoming
8
Colorado
7
Michigan
5
Nebraska
5
New Jersey
5
Washington (State)
5
Idaho
4
Massachusetts
4
Ohio
4
Pennsylvania
4
Alaska
3
Carswell Air Force Base
3
Delaware
3
Long Island
3
Minnesota
3
Oklahoma
3
Snake River Plain Aquifer
3
Tennessee
3
Anacostia River Watershed (Md. and Washington, D.C.)
2
Arizona
2
Ashumet Valley
2
Cape Cod
2
Connecticut
2
Kirkwood-Cohansey Aquifer (N.J.)
2
Maine
2
Maryland
2
Missouri
2
Modesto
2
Nevada
2
Norman
2
Oakland County
2
Oregon
2
San Juan County
2
South Carolina
2
Suffolk County
2
Virginia
2
Abbeville
1
Addison (Township)
1
Albany County
1
Anchorage
1
Andersen Air Force Base
1
Andersen Air Force Base (Guam)
1
Atlantic Coast (U.S.)
1
Austin
1
Barstow Region
1
more ...