Region
California
51
United States
46
Nevada
35
Idaho
27
Colorado
22
Florida
22
North Carolina
20
Washington (State)
15
Ohio
14
Texas
14
West Virginia
14
Wisconsin
13
Tennessee
11
Illinois
10
Oregon
10
Utah
10
Wyoming
10
Minnesota
9
Montana
9
New Jersey
9
South Dakota
9
Alaska
8
Arizona
8
Iowa
8
Kentucky
8
New Mexico
8
Pennsylvania
8
Georgia
7
Louisiana
7
Maryland
7
Mississippi
7
Missouri
7
New York (State)
7
Ohio River Watershed
7
San Bernardino County
7
San Francisco Bay
7
Virginia
7
Massachusetts
6
Nebraska
6
Yakima River Watershed
6
Alabama
5
Idaho National Laboratory Region
5
Kansas
5
Oklahoma
5
Potomac River
5
Snake River Plain (Idaho and Or.)
5
Belvidere
4
Clark Fork Watershed (Mont. and Idaho)
4
Connecticut
4
Delaware River (N.Y.-Del. and N.J.)
4
more ...