Region
United States
19
Colorado
9
Erie, Lake
4
Colorado River (Colo.-Mexico)
2
Huron, Lake (Mich. and Ont.)
2
Idaho
2
Kansas
2
Michigan, Lake
2
Nevada
2
New Mexico
2
Ohio
2
Ontario, Lake (N.Y. and Ont.)
2
Superior, Lake
2
Utah
2
Arizona
1
Clark Fork Watershed (Mont. and Idaho)
1
Clayton County
1
Colorado River Watershed (Colo.-Mexico)
1
Currituck Sound
1
Iowa
1
Michigan
1
New York (State)
1
North Carolina
1
Potomac River
1
Potomac River Estuary
1
Wisconsin
1
Wyoming
1