Region
United States
12
Oregon
7
California
6
Willamette River Watershed
6
New Jersey
4
Connecticut
3
Great Salt Lake Watershed
3
Idaho
3
Potomac River Watershed
3
Texas
3
Utah
3
Wisconsin
3
Wyoming
3
Connecticut River Watershed
2
Housatonic River Watershed (Mass. and Conn.)
2
Long Island
2
Los Angeles
2
Los Angeles Region
2
Middle Atlantic States
2
Minnesota
2
New England
2
New York (State)
2
Northeastern States
2
Ohio
2
Pennsylvania
2
Plum Creek, South Branch
2
Sandy River Watershed
2
Thames River Watershed
2
Alaska
1
Atlanta
1
Atlantic Coast (New England)
1
California, Southern
1
Chattahoochee River
1
Columbia Region
1
Cook Inlet
1
Dayton Region
1
Deer Creek (Butler County and Allegheny County)
1
Deer Creek (Pa. and Md.)
1
Georgia
1
Great Britain
1
Hatfield
1
Indiana
1
Indianapolis
1
Kansas
1
Kirkwood-Cohansey Aquifer (N.J.)
1
Little Miami River Watershed
1
Louisiana
1
Massachusetts
1
Mead, Lake (Ariz. and Nev.)
1
Miami River
1
more ...