Region
Southern States
United States
165
Confederate States of America
9
Mississippi Embayment
6
Northeastern States
6
Floridan Aquifer
5
West (U.S.)
5
Florida
3
Gulf Coast (U.S.)
3
Mexico, Gulf of
3
Middle West
3
Puerto Rico
3
South Carolina
3
United States Virgin Islands
3
Alabama
2
Atlantic Coast (U.S.)
2
Caribbean Area
2
East (U.S.)
2
Georgia
2
Great Britain
2
Mississippi River Valley
2
Apalachicola River
1
Apalachicola River (Fla.)
1
Apalachicola River Estuary
1
Apalachicola River Estuary (Fla.)
1
Apalachicola River Valley
1
Apalachicola River Valley (Fla.)
1
Bessemer
1
British Columbia
1
California
1
Charleston (S.C.)
1
Chattahoochee River
1
Chattahoochee River Valley
1
Chile
1
Claiborne Group
1
Europe
1
Flint River (Tenn. and Ala.)
1
Frenchtown (Tallahassee, Fla.)
1
Germany
1
Gulf States
1
Gullah Geechee Cultural Heritage Corridor
1
Kentucky
1
Louisiana
1
Memphis (Tenn.)
1
Mexico
1
Middle Atlantic States
1
Minnesota River (S.D. and Minn.)
1
Mississippi River
1
Montgomery
1
New England
1
more ...