Region
New Jersey
5
Washington (State)
5
California
4
Massachusetts
4
United States
4
Aberdeen Proving Ground
3
Maryland
3
Long Island
2
Los Angeles
2
Los Angeles Region
2
Mississippi River Watershed
2
Naval Undersea Warfare Engineering Station
2
New York (State)
2
Palouse River Watershed (Idaho and Wash.)
2
Tennessee
2
Arnold Air Force Base Region
1
Bucks County
1
Delaware
1
Dover Air Force Base
1
Fort Lewis
1
Great Salt Lake Watershed
1
Holbrook
1
Illinois River Watershed
1
Keyport
1
Kirkwood-Cohansey Aquifer (N.J.)
1
Mojave Desert
1
Pennsylvania
1
Piscataway
1
Piscataway (Township)
1
Red Brook Harbor
1
Sacramento
1
Tewksbury Region
1
Utah
1