Region
California
15
Massachusetts
14
United States
14
Kansas
10
Alaska
5
Texas
5
Colorado
4
Idaho
4
Arizona
3
Boston Harbor
3
Florida
3
Georgia
3
Neponset River
3
New Jersey
3
Sacramento River
3
Washington (State)
3
Atlantic Coast
2
Beaufort Sea
2
Charles River
2
Cochiti Reservoir
2
Coeur d'Alene River
2
Cook Inlet
2
Erie, Lake
2
Fort Worth
2
Great Lakes (North America)
2
Hawaii
2
Indiana
2
Japan
2
Kachemak Bay
2
Louisiana
2
Massachusetts Bay
2
Michigan, Lake
2
New Mexico
2
North Dakota
2
Perry Lake (Jefferson County)
2
Saint Clair, Lake (Mich. and Ont.)
2
Santa Monica Bay
2
Solomon River Watershed
2
South Dakota
2
Spokane River (Idaho and Wash.)
2
Alabama
1
Alamosa River Watershed
1
All American Canal
1
Austin
1
Big Blue River Watershed (Neb. and Kan.)
1
Biscayne Bay (Fla.)
1
Biscayne Bay Region
1
Boulder River Watershed (Sweet Grass County)
1
British Columbia
1
Caddo Lake (La. and Tex.)
1
more ...