Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
746840
| DC | District of Columbia | Potomac River, 1.2 mile reach from 400 m above Chain Bridge Road to Fletchers Boathouse, W end of D.C. and Arlington | 2010 |
02070008
| Middle Potomac-Catoctin | established |
35053
| MD | | Potomac River | 1854 |
02070008
| Middle Potomac-Catoctin | established |
1672971
| MD | Montgomery | [No locality description provided] | 2019 |
02070008
| Middle Potomac-Catoctin | |
1679032
| MD | Montgomery | [No locality description provided] | 2020 |
02070008
| Middle Potomac-Catoctin | |
747129
| MD | Montgomery | Potomac River, 0.7 mile reach from E end of Swainsons Island upstream to head of Plummers Island and I-495 bridge, SW edge of Bethesda | 2010 |
02070008
| Middle Potomac-Catoctin | established |
746857
| MD | Montgomery | Potomac River, side channels on N side of Swainsons Island, ca. 0.5 miles downstream (E of) I-495 crossing, SW side of Bethesda | 2010 |
02070008
| Middle Potomac-Catoctin | established |
746832
| MD | Montgomery | Potomac River, upstream and downstream ends of Plummers Island and Swainson Island area, just E of I-495 crossing, W side of Bethesda | 2010 |
02070008
| Middle Potomac-Catoctin | established |
280527
| MD | Montgomery | Potomac River, upstream and downstream ends of Plummers Island and Swainson Island area, just E of I-495 crossing, W side of Bethesda | 2010 |
02070008
| Middle Potomac-Catoctin | established |
280530
| MD | Montgomery | Potomac River, upstream and downstream ends of Plummers Island and Swainson Island area, just E of I-495 crossing, W side of Bethesda | 2010 |
02070008
| Middle Potomac-Catoctin | established |
166170
| VA | | middle Potomac-Catoctin drainage | 1994 |
02070008
| Middle Potomac-Catoctin | established |
1675652
| VA | Loudoun | [No locality description provided] | 2020 |
02070008
| Middle Potomac-Catoctin | |
1706867
| VA | Loudoun | [No locality description provided] | 2022 |
02070008
| Middle Potomac-Catoctin | |
153311
| VA | Loudoun | Potomac drainage in Loudon County | 1994 |
02070008
| Middle Potomac-Catoctin | established |