Region
Mississippi
12
New York (State)
12
Florida
11
New Mexico
10
Louisiana
9
Alabama
8
Colorado
8
High Plains Aquifer
6
Minnesota
6
North Carolina
6
South Carolina
5
South Dakota
5
Arkansas
4
Texas
4
Washington (State)
4
Arizona
3
California
3
Denver Basin
3
Long Island
3
Oklahoma
3
Orange County
3
San Juan Basin (N.M. and Colo.)
3
Sarasota County
3
Albuquerque Region
2
Baton Rouge Region
2
Bernalillo County
2
Catron County
2
Denver Region
2
Erie County
2
Great Plains
2
Gulf Coast
2
Hudson River Region (N.Y. and N.J.)
2
Indiana
2
Middle West
2
Missouri
2
New Hampshire
2
New Jersey
2
Oregon
2
Puget Sound Region
2
Southern States
2
Southwest, New
2
Tennessee, East
2
United States
2
Willamette River Valley
2
Wyoming
2
Adirondack Mountains
1
Adirondack Mountains Region
1
Albuquerque
1
Albuquerque (N.M.)
1
Apache County
1
more ...