Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
35053
| MD | | Potomac River | 1854 |
2070008
| Middle Potomac-Catoctin | established |
35052
| MD | | state non-specific | 1874 |
2000000
| Mid Atlantic Region | established |
35092
| MD | | state non-specific | 1875 |
2000000
| Mid Atlantic Region | established |
613213
| MD | Allegany | Sideling Hill Creek | 1998 |
2070003
| Cacapon-Town | established |
613203
| MD | Caroline | Garland Pond, 3 Miles Northeast of Denton, Caroline County, Maryland | 1949 |
2060005
| Choptank | established |
613204
| MD | Caroline | Harmony Pond, Near Preston, Caroline Co., Maryland | 1949 |
2060005
| Choptank | established |
613206
| MD | Cecil | Susquehanna-Atlantic Ocean Drainage: Canowingo Creek: Canowingo Lake Rd. ~ 10 km W rising Sun; 1st riffle upstream of mouth: 1.5 km from bridge (TJN07-22) | 2007 |
2050306
| Lower Susquehanna | established |
613205
| MD | Cecil | Susquehanna-Atlantic Ocean Drainage: Canowingo Creek: Canowingo Lake Rd. ~ 10 km W rising Sun; 1st riffle upstream of mouth: 1.5 km from bridge (TJN07-22) | 2007 |
2050306
| Lower Susquehanna | established |
280535
| MD | Charles | Potomac River, Mattawoman Creek tidal embayment, ca. 2.2 miles of lower reach from Smallwood State Park area upstream to above mouth of Marbury Run, 3.1-1.1 air miles SW-S center Indian Head | 2011 |
2070011
| Lower Potomac | established |
747002
| MD | Charles | Potomac River, Mattawoman Creek tidal embayment, ca. 2.2 miles of lower reach from Smallwood State Park area upstream to above mouth of Marbury Run, 3.1-1.1 air miles SW-S center Indian Head | 2011 |
2070011
| Lower Potomac | established |
613207
| MD | Charles | Zekiak Swamp Run | 1998 |
2070011
| Lower Potomac | established |
613208
| MD | Dorchester | Higgins Mill Pond, Near Railroad Bridge, Dorchester County, Maryland | 1949 |
2080110
| Tangier | established |
613214
| MD | Frederick | Monocacy River, Thurmont, Md. | 1998 |
2070009
| Monocacy | established |
613215
| MD | Frederick | Monocacy River. | 1998 |
2070009
| Monocacy | established |
613216
| MD | Howard | Patapsco River, Ellicott City, Md. | 1998 |
2060003
| Gunpowder-Patapsco | established |
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 |
2070008
| 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 |
2070008
| 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 |
2070008
| 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 |
2070008
| 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 |
2070008
| Middle Potomac-Catoctin | established |
613209
| MD | Prince George's | Cash(?) Lake Prince Georges County Maryland. | 1942 |
2060006
| Patuxent | established |
613211
| MD | Prince George's | Henson Cr., Pr. Georges Co., Maryland | 1934 |
2070010
| Middle Potomac-Anacostia-Occoquan | established |
613210
| MD | Washington | Cascade Lake At Camp Titchie, Near Penmar, Washington Co., Md. | 1949 |
2070004
| Conococheague-Opequon | established |
157937
| MD | Washington | Chesapeake and Ohio Canal National Historical Park | 1999 |
2070004
| Conococheague-Opequon | established |
613212
| MD | Washington | Hagerstown, Md | 1998 |
2070004
| Conococheague-Opequon | established |