Region
California
18
Florida
8
North Carolina
6
Alaska
5
Illinois
4
Texas
4
Arizona
3
Indiana
3
Louisiana
3
Pennsylvania
3
Puerto Rico
3
Virginia
3
American River Watershed (Calif.)
2
Atlantic Intracoastal Waterway
2
Kentucky
2
Lackawanna River Watershed
2
Long Beach
2
Mississippi
2
New Jersey
2
New River Inlet
2
New York (State)
2
North Topsail Beach
2
Ohio
2
Salt River (Gila County and Maricopa County, Ariz.)
2
Savannah River (Ga. and S.C.)
2
Surf City
2
West Onslow Beach
2
Yuba River (Calif.)
2
Yuba River Watershed
2
Alabama
1
American River
1
American River Watershed
1
Anacostia River (Md. and Washington, D.C.)
1
Anacostia River Watershed (Md. and Washington, D.C.)
1
Arkansas
1
Austin
1
Baltimore
1
Barceloneta
1
Big Bend Channel (Fla.)
1
Big Sioux River (S.D. and Iowa)
1
Bloomsburg
1
Boggy Creek (Austin, Tex.)
1
Boston
1
Boston Harbor
1
Boston Harbor (Mass.)
1
Buena Vista
1
Cape Canaveral
1
Cape Canaveral (Fla.)
1
Cape Fear River Watershed
1
Cape Fear River Watershed (N.C.)
1
more ...