Region
United States
665
Colorado
25
British Columbia
8
Canada
8
Ontario
8
Australia
5
Kansas
4
Puerto Rico
4
Colorado River Watershed (Colo.-Mexico)
3
Grand Junction
3
Grand Junction (Colo.)
3
Maine
3
Saskatchewan
3
Alaska
2
Arizona
2
Idaho
2
Kentucky
2
Louisiana
2
Nevada
2
Ohio
2
Oregon
2
Washington (State)
2
West (U.S.)
2
Alabama
1
Alberta
1
Bear Creek Watershed (Park County and Jefferson County)
1
Boise
1
California
1
China
1
Colorado Springs
1
Colorado Springs (Colo.)
1
Columbia River Watershed
1
Delaware
1
Denver
1
Farmington
1
Farmington (Me.)
1
Foreign countries
1
High Plains (U.S.)
1
Illinois
1
India
1
Jefferson County
1
Massachusetts
1
Michigan
1
Mississippi
1
Nebraska
1
Nevada National Security Site (Nev.)
1
New England
1
New Mexico
1
New South Wales
1
New York (State)
1
more ...