Region
Abbeville
1
Addison (Township)
1
Alaska
3
Albany County
1
Anacostia River Watershed (Md. and Washington, D.C.)
2
Anchorage
1
Andersen Air Force Base
1
Andersen Air Force Base (Guam)
1
Arizona
2
Ashumet Valley
2
Atlantic Coast (U.S.)
1
Austin
1
Barstow Region
1
Bexar County
1
Broome County
1
Broward County
1
Bucks County
1
California
8
Camp Edwards
1
Camp Lejeune
1
Campbell County
1
Cape Cod
2
Carbon County
1
Caroline
1
Carswell Air Force Base
3
Charleston
1
Chester County
1
Colorado
7
Connecticut
2
Converse County
1
Dayton Region
1
Delaware
3
Delaware City
1
Denver
1
Düsseldorf
1
Eagle River Watershed
1
East (U.S.)
1
Edwards Aquifer (Tex.)
1
Fair Lawn
1
Fairbanks Region
1
Florida
8
Floridan Aquifer
1
Fort Gordon
1
Fridley
1
Garfield County
1
Georgia
1
Germany
1
Guam
1
Gunnison County
1
Hanford Site (Wash.)
1
more ...