Region
Alaska
2
Arizona
2
California
2
Cook Inlet
2
Big Blue River Watershed (Neb. and Kan.)
1
Carson River Watershed
1
Clark Fork Watershed (Mont. and Idaho)
1
Great Salt Lake Watershed
1
Idaho
1
Kansas
1
Kansas River Watershed
1
Louisiana
1
Middle West
1
Minnesota
1
Mississippi River Region
1
Mississippi River Watershed
1
Nevada
1
New Orleans
1
North Dakota
1
Pend Oreille River Watershed
1
Pontchartrain, Lake
1
Red River of the North Watershed
1
Santa Ana River Watershed
1
South Dakota
1
Spokane River Watershed (Idaho and Wash.)
1
United States
1
Utah
1
Wyoming
1