| <all other values> |
| Anacostia River Tidal Fresh DC |
| Anacostia River Tidal Fresh Maryland |
| Back River Oligohaline |
| Big Annemessex River Mesohaline |
| Bohemia River Oligohaline |
| Bush River Oligohaline |
| C&D Canal Oligohaline Maryland |
| Choptank River Mesohaline 2 |
| Choptank River Mesohaline mouth 1 |
| Choptank River Oligohaline |
| Eastern Bay Mesohaline |
| Elk River Oligohaline |
| Fishing Bay Mesohaline |
| Gunpowder River Oligohaline |
| Honga River Mesohaline |
| Little Choptank River Mesohaline |
| Lower Chesapeake Bay Mesohaline Maryland |
| Lower Chester River Mesohaline |
| Lower Nanticoke River Mesohaline |
| Lower Patuxent River Mesohaline |
| Lower Pocomoke River Mesohaline Maryland |
| Lower Potomac River Mesohaline Maryland |
| Lower Potomac River Oligohaline Maryland |
| Magothy River Mesohaline |
| Manokin River Mesohaline |
| Mattawoman Creek Tidal Fresh |
| Middle Chesapeake Bay Mesohaline |
| Middle Chester River Oligohaline |
| Middle Patuxent River Oligohaline |
| Middle Pocomoke River Oligohaline Maryland |
| Middle River Oligohaline |
| Nanjemoy Creek Oligohaline Maryland |
| North East River Tidal Fresh |
| Northern Chesapeake Bay Oligohaline |
| Northern Chesapeake Bay Tidal Fresh |
| Patapsco River Mesohaline |
| Piscataway Creek tidal Fresh |
| Port Tobacco River Oligohaline Maryland |
| Rhode River Mesohaline |
| Sassafras River Oligohaline |
| Severn River Mesohaline |
| South River Mesohaline |
| Tangier Sound Mesohaline Maryland |
| Upper Chesapeake Bay Mesohaline |
| Upper Chester River Tidal Fresh |
| Upper Choptank River Tidal Fresh |
| Upper Nanticoke River Oligohaline |
| Upper Nanticoke River Tidal Fresh Maryland |
| Upper Patuxent River Tidal Fresh |
| Upper Pocomoke River Tidal Fresh |
| Upper Potomac River Tidal Fresh DC |
| Upper Potomac River Tidal Fresh Maryland |
| West River Mesohaline |
| Western Branch Patuxent River Tidal Fresh |
| Wicomico River Mesohaline |