Place
- New Mexico12
- North Carolina12
- Northeastern States12
- Ohio12
- Pennsylvania12
- Puerto Rico12
- South Dakota12
- Utah12
- Washington (D.C.)12
- West Virginia12
- Wyoming12
- Maine, Gulf of10
- Long Island Sound (N.Y. and Conn.)9
- Noyo River (Calif.)9
- Noyo River Watershed (Calif.)9
- Chesapeake Bay (Md. and Va.)8
- Fundy, Bay of8
- Albemarle Sound (N.C.)7
- Baltimore Canyon7
- Delaware Bay (Del. and N.J.)7