Region
California
13
Idaho
10
Colorado
9
Florida
8
Minnesota
7
New Jersey
7
Calaveras County
6
Idaho National Laboratory Region
6
New York (State)
6
United States
6
Connecticut
5
Long Island
4
Indiana
3
Maryland
3
North Carolina
3
Rio Grande Watershed (Colo.-Mexico and Tex.)
3
San Juan Basin (N.M. and Colo.)
3
Snake River Plain (Idaho and Or.)
3
Arizona
2
Delmarva Peninsula
2
Floridan Aquifer
2
Georgia
2
High Plains (U.S.)
2
High Plains Aquifer
2
Kansas
2
Long Island Sound (N.Y. and Conn.)
2
Marion County
2
Missouri
2
Nepaug Reservoir Watershed
2
Oregon
2
Ozark Mountains
2
Pennsylvania
2
Pinellas County
2
Powder River Watershed (Wyo. and Mont.)
2
Puerto Rico
2
Republican River Watershed (Neb. and Kan.)
2
Riverside County
2
Saint Charles County
2
San Gabriel River Watershed
2
San Gabriel River Watershed (Calif.)
2
San Luis Valley (Colo. and N.M.)
2
Santa Ana River
2
Seminole County
2
Tennessee
2
Tongue River (Wyo. and Mont.)
2
Waterbury
2
Wisconsin
2
Wolcott (Town)
2
Aberdeen Proving Ground
1
Alameda County
1
more ...