Region
Mississippi
9
Nevada
8
California
7
Hawaii
7
Arkansas
6
Colorado
5
High Plains Aquifer
5
New Mexico
5
Arizona
4
Georgia
4
Santa Barbara County
4
Texas
4
Black Mesa (Navajo County and Apache County)
3
Denver Basin
3
Florida
3
Galveston Region
3
Houston Region
3
Indiana
3
Pennsylvania
3
Snake River Plain (Idaho and Or.)
3
Wyoming
3
Yucca Mountain Region
3
Albuquerque Basin
2
Chester County
2
Glynn County
2
Hawaii Island
2
High Plains (U.S.)
2
Idaho
2
Kansas
2
Lake County
2
Mississippi River Valley
2
Molokai
2
Montana
2
Nahiku Region
2
Nye County
2
Oregon
2
Rhode Island
2
South Platte River Watershed (Colo. and Neb.)
2
Tennessee, West
2
Washington (State)
2
Wilcox Group
2
Yucca Mountain
2
Aiken County
1
Arnold Air Force Base
1
Atlantic Coast (U.S.)
1
Bijou Creek Watershed
1
Bijou Creek Watershed (Colo.)
1
Black Mesa Region (Navajo County and Apache County)
1
Boone County
1
Brazoria County Groundwater Conservation District (Tex.)
1
more ...