Region
Colorado
46
Florida
29
Minnesota
22
Washington (State)
21
Kansas
20
Wisconsin
20
California
16
Oklahoma
15
Texas
15
New York (State)
14
Oregon
14
United States
14
Arizona
13
Utah
12
Illinois
11
North Carolina
11
South Carolina
11
Georgia
10
Missouri
10
Ohio
10
Pennsylvania
10
Connecticut
9
Wyoming
9
Alabama
8
Arkansas
8
Massachusetts
8
New Mexico
8
Floridan Aquifer
7
Iowa
7
Kentucky
7
New Jersey
7
Indiana
6
Montana
6
Nebraska
6
Nevada
6
Jefferson County
5
Maryland
5
Mississippi River Watershed
5
Puerto Rico
5
South Dakota
5
Southern States
5
Yakima River Watershed
5
Alaska
4
Hawaii
4
Louisiana
4
Michigan
4
Tenmile Creek Watershed (Lewis and Clark County)
4
Alamosa River Watershed
3
Apalachicola River Watershed
3
Chattahoochee River Watershed
3
more ...