Region
United States
138
Colorado
26
Great Lakes (North America)
3
Mexican-American Border Region
3
New York (State)
3
California
2
Kentucky
2
Laurel County
2
New Mexico
2
San Juan County
2
Alaska
1
Androscoggin River (N.H. and Me.)
1
Boston Harbor
1
China
1
Clackamas County
1
Denver Metropolitan Area
1
Douglas County
1
Eagle County
1
Europe
1
Florida
1
Fort Bliss
1
Governors Island (New York County, N.Y.)
1
Johnston Atoll
1
Johnston Island
1
Kodiak Island
1
Long Island
1
Massachusetts
1
Michigan
1
Mississippi
1
Montana
1
New Hampshire
1
New York
1
New York County
1
Oregon
1
Pennsylvania
1
Pueblo
1
Rocky Mountain Arsenal
1
Southern States
1
Texas
1
Utah
1
West (U.S.)
1
West Virginia
1