Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
35054
| MD | | Choptank River | 1980 |
02060005
| Choptank | established |
35101
| MD | | northern part of eastern shore | 1980 |
02060002
| Chester-Sassafras | established |
35128
| MD | | Northwest area of the bay drainage | 1980 |
02060003
| Gunpowder-Patapsco | established |
35095
| MD | | Patuxent drainage | 1980 |
02060006
| Patuxent | established |
35042
| MD | | Pocomoke River | 1980 |
02080111
| Pokomoke-Western Lower Delmarva | established |
35131
| MD | | state non-specific | 1980 |
02000000
| Mid Atlantic Region | established |
35197
| MD | | Upper Chesapeake (HUC6) non-specific | 1981 |
02060000
| Upper Chesapeake | established |
1406215
| MD | Anne Arundel | Maryland, Anne Arundel County, North Fork Muddy Creek | 2014 |
02060004
| Severn | established |
1406223
| MD | Anne Arundel | Pond along W side of Ritchie Hwy, 1 mi S of Earleigh Heights. | 1975 |
02060004
| Severn | established |
280547
| 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 |
02070011
| Lower Potomac | established |
613342
| MD | Dorchester | Higgins Mill Pond, Near Railroad Bridge, Dorchester Co., Maryland | 1949 |
02080110
| Tangier | established |
613348
| MD | Montgomery | Potomac River, Plummer's Island, 0.25 miles below I-495, SW of Bethesda | 1995 |
02070008
| Middle Potomac-Catoctin | established |
280541
| 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 | 1995 |
02070008
| Middle Potomac-Catoctin | established |
613345
| MD | Prince George's | Cash Lake Patuxent Refuge | 1947 |
02060006
| Patuxent | established |
613343
| MD | Prince George's | Cash Lake, Patuxent Refuge, Prince Geo. Co., Md. | 1950 |
02060006
| Patuxent | established |
613346
| MD | Prince George's | Cash Lake-Patuxent Refuge | 1947 |
02060006
| Patuxent | established |
613347
| MD | Prince George's | Cash Lake-Patuxent Refuge | 1947 |
02060006
| Patuxent | established |
157939
| MD | Washington | Chesapeake and Ohio Canal National Historical Park | 1999 |
02070004
| Conococheague-Opequon | established |
613344
| MD | Washington | Hagerstown, Md | 1998 |
02070004
| Conococheague-Opequon | established |