Geography
United States
384 results
California
218 results
Alaska
145 results
Florida
142 results
Texas
116 results
Colorado
108 results
Nevada
72 results
Washington (State)
71 results
Idaho
69 results
Michigan
67 results
Arizona
60 results
New York (State)
58 results
Wyoming
54 results
Hawaii
53 results
Massachusetts
48 results
New Jersey
47 results
New Mexico
46 results
Utah
40 results
Oregon
37 results
Louisiana
35 results
Virginia
34 results
Wisconsin
34 results
Indiana
32 results
West (U.S.)
31 results
Pennsylvania
30 results
Montana
29 results
Georgia
28 results
Maryland
28 results
Maine
26 results
Puerto Rico
26 results
Kansas
25 results
Missouri
25 results
Oklahoma
24 results
Minnesota
23 results
South Carolina
23 results
Floridan Aquifer
22 results
Afghanistan
20 results
Middle West
20 results
Powder River Basin (Wyo. and Mont.)
20 results
Colorado River (Colo.-Mexico)
19 results
Ohio
19 results
Everglades
18 results
North Carolina
17 results
Oakland County
17 results
New Hampshire
16 results
Tennessee
16 results
National Petroleum Reserve
15 results
Nebraska
15 results
Northwest, Pacific
15 results
Russia (Federation)
15 results
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