Region
Mississippi
18
New York (State)
12
Kansas
9
New Jersey
9
North Carolina
9
Florida
8
High Plains Aquifer
8
Louisiana
8
Arkansas
7
New Hampshire
7
Texas
7
Black Hills (S.D. and Wyo.)
5
Maryland, Southern
5
New Mexico
5
Ozark Mountains Region
5
Southern States
5
Middle West
4
Pennsylvania
4
Alabama
3
Black Creek Aquifer (S.C. and N.C.)
3
Bladen County
3
Delaware
3
Floridan Aquifer
3
High Plains (U.S.)
3
Houston Region
3
Long Island
3
Mississippi River Valley
3
Oneida County
3
Robeson County
3
Santa Fe Group
3
Arizona
2
Bucks County
2
Great Basin
2
Harris-Galveston Coastal Subsidence District (Tex.)
2
Hawthorn Formation
2
Jefferson County
2
Kentucky
2
Missouri
2
Naval Ordnance Station Louisville (Ky.)
2
Ocean County
2
Ohio
2
Puerto Rico
2
Rancocas Creek Watershed
2
Rio Grande Valley (Colo.-Mexico and Tex.)
2
United States
2
Wyoming
2
Albuquerque Region
1
Appalachian Region
1
Aquia Formation
1
Austin
1
more ...