Region
Florida
11
Palm Beach County
7
Arkansas
5
Maryland, Southern
5
Virginia
4
Alaska
3
Chester County
3
Michigan
3
New Mexico
3
Pennsylvania
3
Wyoming
3
Albuquerque Basin
2
Aquia Formation
2
Arizona
2
Georgia
2
Kansas
2
North Carolina
2
Oregon
2
Patapsco Aquifer
2
Texas
2
Utah
2
Washington (State)
2
Albuquerque Basin (N.M.)
1
Albuquerque Region
1
Black Hills (S.D. and Wyo.)
1
Black Mesa (Navajo County and Apache County)
1
Black Mesa Region (Navajo County and Apache County)
1
Block Island (Island)
1
Brewster
1
Broward County
1
California
1
Colorado
1
Custer County Region
1
Elkhart
1
Fairbanks Region
1
Floridan Aquifer
1
Great Salt Lake
1
Great Salt Lake Region
1
Harwich
1
Houston Region
1
Indian Wells Region
1
Indiana
1
Logan County
1
Magothy Aquifer
1
Massachusetts
1
Miami-Dade County
1
Mississippi River Valley
1
Nevada
1
New York (State)
1
Rhode Island
1
more ...