Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
747539
| DC | District of Columbia | Potomac River, cove area between Gravelly Point and N end of National Airport near boat ramp, in E Arlington | 2010 |
02070010
| Middle Potomac-Anacostia-Occoquan | established |
271971
| MD | Charles | Nanjemoy Creek | 2010 |
02070011
| Lower Potomac | established |
624390
| MD | Frederick | Monocacy River, 100 yards south of Devilbiss Bridge parking lot | 2013 |
02070009
| Monocacy | established |
271927
| MD | Prince George's | Potomac River near Fort Washington | 2010 |
02070010
| Middle Potomac-Anacostia-Occoquan | established |
848983
| MD | Prince George's | Potomac River near Fort Washington | 2012 |
02070010
| Middle Potomac-Anacostia-Occoquan | established |
859909
| MD | Prince George's | Potomac River near Fort Washington | 2015 |
02070010
| Middle Potomac-Anacostia-Occoquan | established |
268180
| VA | | western division of Piedmont (Potomac drainage) | 1981 |
02070007
| Shenandoah | established |
45278
| VA | Fairfax | middle Potomac-Anacostia-Occoquan drainage | 1994 |
02070010
| Middle Potomac-Anacostia-Occoquan | established |
45609
| VA | Fairfax | Potomac River, Fairfax County, just below Washington D.C. | 1994 |
02070010
| Middle Potomac-Anacostia-Occoquan | collected |