Geography
United States
4,632 results
Texas
767 results
California
334 results
Edwards Aquifer (Tex.)
235 results
New York (State)
146 results
Colorado
136 results
Washington (State)
119 results
New Jersey
104 results
Florida
103 results
Massachusetts
99 results
Great Lakes (North America)
98 results
Pennsylvania
94 results
Idaho
92 results
Minnesota
82 results
Michigan
74 results
Ohio
72 results
Canada
71 results
North Carolina
68 results
Wisconsin
67 results
Alaska
65 results
Virginia
64 results
Tennessee
62 results
Nevada
60 results
Great Britain
59 results
Montana
56 results
Alabama
55 results
San Antonio
55 results
Oregon
52 results
Wyoming
51 results
China
50 results
Maryland
50 results
Illinois
49 results
Kansas
49 results
Chesapeake Bay (Md. and Va.)
48 results
Europe
48 results
Indiana
47 results
Missouri
47 results
South Carolina
45 results
Utah
45 results
Bexar County
44 results
Georgia
42 results
Oklahoma
42 results
Kentucky
41 results
Mexico, Gulf of
41 results
New Mexico
41 results
Arizona
36 results
Hays County
36 results
Mississippi
36 results
Louisiana
35 results
Hawaii
34 results
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