Region
United States
134
California
119
Florida
109
Colorado
98
New York (State)
71
Wisconsin
65
Texas
63
Kansas
58
Minnesota
57
Oregon
55
New Jersey
42
Pennsylvania
42
Washington (State)
41
Ohio
39
Idaho
38
Louisiana
38
North Carolina
37
Arizona
34
Missouri
33
Wyoming
30
Georgia
29
Arkansas
28
Alaska
27
Indiana
27
Montana
27
New Mexico
26
Virginia
26
Illinois
25
Massachusetts
25
Michigan
25
North Dakota
23
Nevada
21
Utah
20
Nebraska
19
South Carolina
19
South Dakota
19
Clark Fork Watershed (Mont. and Idaho)
17
Floridan Aquifer
17
Kentucky
17
Connecticut
16
Maryland
16
Oklahoma
15
Hawaii
14
Iowa
14
Tennessee
14
Alabama
13
Illinois River Watershed
13
Southern States
13
Mississippi River Watershed
12
Chesapeake Bay Watershed
11
more ...