Region
United States
26
California
4
Indiana
2
New Jersey
2
Sacramento River
2
San Joaquin River
2
Apalachicola River Watershed
1
California, Southern
1
Chattahoochee River Watershed
1
Delta Region
1
Flint River Watershed
1
Florida
1
Georgia
1
Middle Atlantic States
1
Middle West
1
Minnesota
1
Mississippi River
1
North Carolina
1
Otter Tail County
1
Pocomoke River Watershed (Del. and Md.)
1
Potomac River Watershed
1
Red River of the North Watershed
1
Sacramento Valley
1
San Joaquin River Watershed
1
Texas
1
Trinity River Watershed
1
Washington (State)
1
White River Watershed
1