Region
- Delaware River Watershed (N.Y.-Del. and N.J.)1
- High Plains (U.S.)1
- Kansas1
- Mississippi Embayment1
- New York (State)Adirondack Mountains1
- New York (State)Mohawk River1
- Niagara River Watershed (N.Y. and Ont.)1
- OhioLucas County1
- OhioSandusky County1
- OhioWood County1
- Powder River Watershed (Wyo. and Mont.)1
- Puerto Rico1
- Puerto RicoCaguas1
- Puerto RicoGurabo Region1
- Puerto RicoJuana Diaz Region1
- Puerto RicoJuncos Region1
- Puerto RicoManatí Region1
- Puerto RicoPonce Region1
- Puerto RicoVega Baja Region1
- Suwannee River (Ga. and Fla.)1