Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
35121
| MD | | Potomac River | 1980 |
02070008
| Middle Potomac-Catoctin | established |
35122
| MD | | upper Chesapeake Bay near Aberdeen | 1980 |
02060003
| Gunpowder-Patapsco | established |
268095
| MD | | Upper Chesapeake (HUC6) non-specific | 1981 |
02060000
| Upper Chesapeake | established |
1334598
| MD | Charles | Potomac River at Indianhead | 1976 |
02070010
| Middle Potomac-Anacostia-Occoquan | established |
1333875
| MD | Dorchester | Choptank River, near [Greenlawn Cemetery], [ca. 1.8 air miles WNW center Cambirdge], [see remarks] | 1969 |
02060005
| Choptank | established |
1334603
| MD | Prince George's | Potomac River at Fort Washington | 1976 |
02070010
| Middle Potomac-Anacostia-Occoquan | established |
1333725
| MD | Wicomico | Maryland, Wicomico County | 2012 |
02080109
| Nanticoke | established |
1333726
| MD | Wicomico | Maryland, Wicomico County | 2012 |
02080109
| Nanticoke | established |
1333727
| MD | Wicomico | Maryland, Wicomico County | 2012 |
02080109
| Nanticoke | established |
1333729
| MD | Wicomico | Maryland, Wicomico County | 2012 |
02080109
| Nanticoke | established |
1333731
| MD | Wicomico | Maryland, Wicomico County | 2012 |
02080109
| Nanticoke | established |