Region
Colorado
41
Florida
28
Washington (State)
21
Kansas
20
Wisconsin
20
Minnesota
18
California
15
Oklahoma
15
Texas
15
New York (State)
14
Oregon
14
United States
13
Illinois
11
North Carolina
11
South Carolina
11
Arizona
10
Georgia
10
Missouri
10
Pennsylvania
10
Connecticut
9
Ohio
9
Wyoming
9
Alabama
8
Arkansas
8
Massachusetts
8
New Mexico
8
Utah
8
Floridan Aquifer
7
Iowa
7
Kentucky
7
Indiana
6
Montana
6
Nebraska
6
New Jersey
6
Jefferson County
5
Maryland
5
Mississippi River Watershed
5
Nevada
5
Puerto Rico
5
South Dakota
5
Yakima River Watershed
5
Alaska
4
Michigan
4
Tenmile Creek Watershed (Lewis and Clark County)
4
Alamosa River Watershed
3
Apalachicola River Watershed
3
Chattahoochee River Watershed
3
Cheney Reservoir Watershed
3
Delta Region
3
Fraser River Watershed
3
more ...