Region
United States
2,322
California
112
Colorado
50
New York (State)
45
China
44
New Jersey
37
Washington (State)
36
Florida
33
Tennessee
33
Idaho
31
Great Lakes (North America)
28
Minnesota
27
Pennsylvania
25
Texas
25
Michigan
24
Great Britain
19
India
18
Massachusetts
18
Nevada
18
Chesapeake Bay (Md. and Va.)
17
North America
17
West Virginia
17
Idaho National Laboratory Region
16
Kansas
16
Wisconsin
16
Alabama
15
Alaska
14
Canada
14
Georgia
14
Gold King Mine (San Juan County, Colo.)
14
Mexico, Gulf of
14
North Carolina
14
Ohio
13
Montana
12
Oregon
12
Wyoming
12
Arizona
11
Connecticut
11
Illinois
11
Indiana
11
Virginia
11
Appalachian Region
10
Iowa
10
Los Angeles
10
Utah
10
Australia
9
Developing countries
9
Europe
9
Great Lakes Region (North America)
9
Maryland
9
more ...