Region
California
122
United States
98
Florida
95
Colorado
77
Minnesota
61
Wisconsin
58
Oregon
56
Kansas
55
New York (State)
55
Texas
46
Pennsylvania
43
Ohio
42
Washington (State)
42
Idaho
40
North Carolina
40
Arizona
36
Georgia
32
Missouri
32
Montana
32
Louisiana
31
New Jersey
31
Massachusetts
28
Indiana
26
North Dakota
26
Wyoming
26
Illinois
25
Virginia
25
New Mexico
23
Arkansas
22
Kentucky
22
South Carolina
21
Michigan
20
Connecticut
17
Hawaii
17
Nebraska
17
Maryland
16
Nevada
16
South Dakota
16
Utah
16
Tennessee
15
Iowa
14
Floridan Aquifer
13
San Francisco Bay
13
Southern States
13
Alaska
12
Oklahoma
12
Clark Fork Watershed (Mont. and Idaho)
11
Willamette River
11
Illinois River Watershed
10
Maine
10
more ...