Region
Alaska
111
New Mexico
91
Colorado
90
California
77
United States
59
Wyoming
55
San Juan County
52
San Juan County (N.M.)
50
New York (State)
46
Nevada
45
Florida
41
Arizona
39
Utah
38
Montana
31
Kansas
30
Oswego County
29
Texas
28
Washington (State)
23
Idaho
22
Oklahoma
22
Campbell County
21
West Chichagof-Yakobi Wilderness
20
North Carolina
17
Oregon
17
Campbell County (Wyo.)
15
Pennsylvania
15
Rio Arriba County
15
Rio Arriba County (N.M.)
15
Arkansas
14
Virginia
14
Michigan
13
Illinois
12
Minnesota
11
Mississippi
11
Missouri
11
Sandoval County
11
Sandoval County (N.M.)
11
Tennessee
11
Alabama
10
Georgia
10
High Plains Aquifer
10
Johnson County
10
Johnson County (Wyo.)
10
Maine
10
Powder River County
10
California, Southern
9
Hawaii
9
Mohave County
9
Rio Blanco County
9
Saudi Arabia
9
more ...