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Maryland Waters with TMDL Documents (M-Z)

All projects are TMDLs unless otherwise noted.

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Basin Name

DNR 8-digit Basin Number

I​​​mpairment
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) 537-3818.​​