Maryland Waters with TMDL Documents (M-Z)

All projects are TMDLs unless otherwise noted.

Basin Name	DNR 8-digit Basin Number	Impairment
Magothy River	02131001	Bacteria, BSID, PCBs
Manokin River	02130208	Bacteria, Nutrients & BOD
Marsh Run	02140503	BSID, Sediment
Marshyhope Creek	02130306	BSID, Nutrients
Mattawoman Creek	02140111	BSID, Nutrients, PCBs
Middle Chester River	02130509	Bacteria, BSID, Nutrients, Nutrient & Sediment (Urieville Community Lake)
Middle River	02130807	Lead & Cadmium (WQA)
Middle Patuxent River	02131106	Nutrients (WQA), Sediments (WQA), Zinc (WQA)
Miles River	02130502	Bacteria
Monie Bay	02130302	Bacteria
Nanticoke River	02130305	Bacteria, BSID
Newport Bay	02130105	Bacteria (WQA), Nitrogen and Phosphorus
Northeast River	02130608	Lead (WQA), PCBs, Nutrients, Zinc (WQA)
Patuxent River Lower	02131101	Bacteria, BSID, Chlorpyrifos (Pesticide), Mercury (Lake Lariat), Sediment
Patuxent River Middle	02131102	BSID, Chlorpyrifos (Pesticide), PCBs, Sediment
Patuxent River Upper	02131104	Bacteria, BSID, Mercury (Cash Lake), Nutrients (WQA), Sediments
Piscataway Creek	02140203	Bacteria, BSID, PCBs, Sediment
Pocomoke Sound	02130201	Fecal Coliform
Port Tobacco River	02140109	Nutrients, Sediment
Potomac River, Lower Tidal	02140101	PCBs
Potomac River, Middle Tidal	02140102	Copper, Cadmium, Chromium, Lead (WQA), PCBs
Potomac River, Upper Tidal	02140201	BSID, Copper (WQA), PCBs
Potomac River Montgomery County	02140202	BSID, Nutrients (WQA), Sediments
Potomac River Washington County	02140501	BSID, Nutrient (Phosphorus) (WQA), Sediment
Prettyboy Reservoir	02130806	Non-Tidal Bacteria, Heavy Metals (WQA), Mercury, Nutrients
Rock Creek	02140206	Bacteria, BSID, Nutrients (Phosphorus), Nutrients (Lake Bernard Frank), Nutrients (Needwood Lake), Sediments
Rocky Gorge Reservoir/T. Howard Duckett Reservoir (Patuxent River)	02131107	BSID, Mercury (WQA), Phosphorus
Sassafras River	02130610	Nutrients, PCBs
Savage River	02141006	Low pH, Nutrients (WQA), Mercury (Savage River Reservoir)
Seneca Creek	02140208	BSID, Nutrients (WQA), Sediment, Nutrient and Sediment (Clopper Lake), Nutrient (Little Seneca Lake)
Severn River	02131002	Bacteria, PCBs
Sinepuxent Bay	02130104	Bacteria (WQA), Nitrogen and Phosphorus
South Branch Patapsco River	02130908	Nutrient & Sediment (Piney Run Reservoir)
South River	02131003	Bacteria, BSID, PCBs, Sediment
Southeast Creek (Chester River)	02130508	Fecal Coliform, Phosphorus
St. Clements Bay	02140105	Bacteria
St. Mary's River	02140103	Bacteria, BSID, Mercury (St. Mary's Lake), Nutrients (WQA, St. Mary's Lake)
Stillpond-Fairlee-Worton Creek	02130611	Nutrients
Swan Creek	02130706	BSID, Nutrients, Sediments
Tangier Sound	02130206	Bacteria
Town Creek	02140512	Nutrients (WQA), Sediments (WQA)
Transquaking River	02130308	BSID, Nutrients, Nutrients (Chicamicomico River)
Triadelphia Reservoir (Brighton Dam - Patuxent River)	02131108	Phosphorus & Sediments
Tuckahoe Creek	02130405	Mercury (Tuckahoe Lake)
Upper Choptank River	02130404	BSID, Sediment
Upper Elk River	02130603	PCBs
Upper Monocacy River	02140303	Bacteria, BSID, Nutrients, Sediments
Upper North Branch of the Potomac River	02141005	BSID, Iron and Aluminum, Low pH, Metals (WQA), Nutrients (WQA), Sediments
Upper Pocomoke River	02130203	BSID, Phosphorus, Sediments, Nutrients and Sediment (Adkins Pond)
West Chesapeake Bay Drainage	02131005	Bacteria, BSID, Sediment
West River/Rhode River	02131004	Bacteria, BSID, PCBs, Sediment
Western Branch, Patuxent	02131103	BOD
Wicomico Creek	02130303	Nutrients
Wicomico River Headwaters	02130304	Bacteria, Nutrient and Sediment (Johnson Pond)
Wicomico River	02140106	Bacteria
Wills Creek	02141003	Bacteria, BSID, Cyanide (WQA), Low pH, Nutrients (WQA), pH (WQA), Sediments
Worton Creek	02130611	Nutrients
Wye River	02130503	Bacteria
Youghiogheny River	05020201	Bacteria (Cherry Creek), BSID, Low pH, Nutrients (WQA), Sediments
Zekiah Swamp	02140108	Copper, Selenium, Zinc, Lead (WQAs)

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WQA = Water Quality Analysis

¹Action may take two forms: submittal of a Total Maximum Daily Load (TMDL) or submittal of a Water Quality Analysis (WQA). TMDLs are developed when a given substance or stressor is exceeding water quality standards. WQAs are developed when supplemental data indicate the waterbody is meeting water quality standards for that substance. This list is subject to change.

Additional TMDL Resources

Contact Information

Please direct questions or comments concerning Maryland's TMDL Program to mde.tmdlcoordinator@maryland.gov or call (410) 537-3884.