Region
Colorado
18
California
12
Arizona
11
Utah
10
Wyoming
8
Nevada
7
New Mexico
6
Balochistan Region
5
Kansas
5
Middle West
5
Pakistan
5
Texas
5
Florida
4
Montana
4
Wisconsin
4
Michigan
3
Mississippi
3
North Carolina
3
North Dakota
3
Nye County
3
San Juan Basin (N.M. and Colo.)
3
South Carolina
3
Africa, Eastern
2
Alaska
2
Appalachian Basin
2
Emery County
2
Jones County
2
Long Island Sound (N.Y. and Conn.)
2
Minnesota
2
Missouri
2
New England
2
New York (State)
2
Northeastern States
2
Oklahoma
2
Onslow County
2
Powder River Watershed (Wyo. and Mont.)
2
Southwest, New
2
Washington (State)
2
Alabama
1
Ambler Lowland
1
Anadarko Basin
1
Arbuckle-Simpson Aquifer
1
Arbuckle-Simpson Aquifer (Okla.)
1
Argentina
1
Arkansas
1
Australia
1
Bernalillo County
1
Bighorn River Watershed (Wyo. and Mont.)
1
Biscayne Aquifer
1
Black Creek Aquifer (S.C. and N.C.)
1
more ...