Region
Arkansas
3
Atlantic Coast
2
Rhode Island
2
Vermont
2
Washington (State)
2
Arizona
1
Burlington
1
Cape Cod
1
Colorado River (Colo.-Mexico)
1
East (U.S.)
1
Elk Grove Village
1
Florida
1
Great Lakes Watershed (North America)
1
Hawaii
1
Illinois
1
Indiana
1
Lihue
1
Massachusetts
1
Michigan, Lake, Watershed
1
Montana
1
Narragansett Bay (R.I.)
1
New Hampshire
1
New Jersey
1
Ohio
1
Pawcatuck River Watershed (R.I. and Conn.)
1
Permian Basin (Tex. and N.M.)
1
Southwestern States
1
Tennessee
1
United States
1
Wisconsin
1
Yakima River Watershed
1