Region
United States
40
East (U.S.)
3
Middle West
3
Chesapeake Bay (Md. and Va.)
2
Florida
2
Great Lakes (North America)
2
Great Plains
2
Southern States
2
West (U.S.)
2
Anne Arundel County
1
Appalachian Region
1
Arkansas
1
California
1
Chesapeake Bay Watershed
1
Columbia River Watershed
1
Iowa
1
Lake Elsinore
1
Lake States
1
Maryland
1
Michigan, Lake, Watershed
1
Middle Atlantic States
1
South Atlantic States
1