Legend (Overlays/Watersheds)

Biomonitoring Subwatersheds (2016-2021; MCDEP) (6) Excellent Good Fair Poor No Stream Monitoring Data Available for this Area Watersheds (DNR, 6-Digit) (1) BUSH RIVER CHESAPEAKE BAY (PROPER) CHESTER RIVER CHOPTANK RIVER COASTAL AREA CONEWAGO CREEK ELK RIVER GUNPOWDER RIVER LOWER POTOMAC RIVER LOWER SUSQUEHANNA RIVER MIDDLE POTOMAC RIVER NANTICOKE RIVER NORTH BRANCH POTOMAC RIVER PATAPSCO RIVER PATUXENT RIVER POCOMOKE RIVER UPPER POTOMAC RIVER WASHINGTON METROPOLITAN WEST CHESAPEAKE BAY YOUGHIOGHENY RIVER Watersheds (DNR, 8-Digit) (2) Aberdeen Proving Ground Anacostia River Antietam Creek Assawoman Bay Atkisson Reservoir Atlantic Ocean Back Creek Back River Baltimore Harbor Big Annemessex River Big Elk Creek Bird River Bodkin Creek Bohemia River Breton Bay Brighton Dam Broad Creek Bush River Bynum Run Cabin John Creek Casselman River Catoctin Creek Chincoteague Bay Christina River Conewago Creek Conococheague Creek Conowingo Dam Susq R Corsica River Deep Creek Lake Deer Creek Dividing Creek Double Pipe Creek Eastern Bay Evitts Creek Fifteen Mile Creek Fishing Bay Furnace Bay Georges Creek Gilbert Swamp Gunpowder River Gwynns Falls Honga River Isle of Wight Bay Jones Falls Kent Island Bay Kent Narrows L Susquehanna River Langford Creek Liberty Reservoir Licking Creek Little Choptank Little Conococheague Little Elk Creek Little Gunpowder Falls Little Patuxent River Little Tonoloway Creek Little Youghiogheny R Loch Raven Reservoir Lower Chesapeake Bay Lower Chester River Lower Choptank Lower Elk River Lower Gunpowder Falls Lower Monocacy River Lower Pocomoke River Lower Wicomico River Lower Winters Run Magothy River Manokin River Marsh Run Marshyhope Creek Mattawoman Creek Middle Chesapeake Bay Middle Chester River Middle Patuxent River Middle River - Browns Miles River Monie Bay Nanjemoy Creek Nanticoke River Nassawango Creek Newport Bay Northeast River Octoraro Creek Oxon Creek Patapsco River L N Br Patuxent River lower Patuxent River middle Patuxent River upper Piscataway Creek Pocomoke Sound Port Tobacco River Potomac River AL Cnty Potomac River FR Cnty Potomac River L N Branch Potomac River L tidal Potomac River M tidal Potomac River MO Cnty Potomac River U N Branch Potomac River U tidal Potomac River WA Cnty Prettyboy Reservoir Rock Creek Rocky Gorge Dam S Branch Patapsco Sassafras River Savage River Seneca Creek Severn River Sideling Hill Creek Sinepuxent Bay South River Southeast Creek St. Clements Bay St. Mary's River Stillpond-Fairlee Swan Creek Tangier Sound Tonoloway Creek Town Creek Transquaking River Tuckahoe Creek Upper Chesapeake Bay Upper Chester River Upper Choptank Upper Elk River Upper Monocacy River Upper Pocomoke River West Chesapeake Bay West River Western Branch Wicomico Creek Wicomico River Wicomico River Head Wills Creek Wye River Youghiogheny River Zekiah Swamp Watersheds (DNR, 12-Digit) (3) 021309081025 021311070941 021311070942 021311070943 021311070944 021311070945 021311080966 021311080969 021402020844 021402020845 021402020846 021402020847 021402020848 021402020849 021402020850 021402020851 021402020852 021402020853 021402050818 021402050821 021402050825 021402050826 021402050827 021402050828 021402050829 021402060831 021402060836 021402060837 021402060838 021402060839 021402060840 021402070841 021402080854 021402080855 021402080856 021402080857 021402080858 021402080859 021402080860 021402080861 021402080862 021402080863 021402080864 021402080865 021402080866 021403020222 021403020223 021403020226 021605020225 Watersheds (Hansen; M-NCPPC) (4) Watersheds (MS4, MCDEP) (5) Anacostia River Cabin John Creek Lower Monocacy River Lower Potomac Direct Patuxent Rock Creek Seneca Creek Upper Potomac Direct Subwatersheds (MCDEP) (0)