Region
Michigan
15
New Jersey
11
United States
9
Washington (State)
9
Iowa
8
Florida
7
Oakland County
7
California
6
Long Island
6
New York (State)
6
Chesapeake Bay Watershed
5
Colorado
5
Idaho
5
Maryland
5
Montana
5
Nevada
5
Kirkwood-Cohansey Aquifer (N.J.)
4
Nebraska
4
North Carolina
4
San Joaquin Valley
4
San Luis Valley (Colo. and N.M.)
4
Suwannee River (Ga. and Fla.)
4
Delmarva Peninsula
3
High Plains Aquifer
3
Long Island Sound (N.Y. and Conn.)
3
Minnesota
3
Otter Tail County
3
Texas
3
Arizona
2
Columbia Basin Ground Water Management Area
2
Douglas County
2
East Otter Tail County Soil and Water Conservation District (Minn.)
2
Fort Peck Indian Reservation
2
Gaines County
2
Gallatin County
2
Highlands County
2
Hitchcock County
2
Manatí Region
2
Middle Atlantic States
2
Mississippi River Valley
2
Pasco Basin (Wash.)
2
Polk County
2
Potomac River Watershed
2
Puerto Rico
2
Red Willow County
2
Republican River Watershed (Neb. and Kan.)
2
Salt River Valley (Gila County and Maricopa County)
2
Susquehanna River Watershed
2
Terry County
2
Utah
2
more ...