Current Status of TMDL Development in Maryland M-Z

Current Status of Total Maximum Daily Load Development in Maryland (M-Z)

All projects are TMDLs unless otherwise noted.

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Basin Name

DNR 8-digit Basin Number

I​​​mpairment

Status

Magothy River 02131001

Bacteria

Approved:
Feb. 20, 2006

Magothy River 02131001 PCBs Approved:
March 16, 2015
Manokin River 02130208

Nutrients & BOD

Approved:
Feb. 13, 2001
Manokin River 02130208

Bacteria

Approved:
Feb. 20, 2006
Marley Creek  02130903 Bacteria Approved:
March 10, 2011
Marshyhope Creek 02130306

Nutrients

Approved:
Feb. 13, 2001
Mattawoman Creek 02140111

Nutrients

Approved:
Jan. 5, 2005
Middle River 02130807

Lead & Cadmium (WQA)

EPA Concurrence:
Nov. 10, 2003

Middle Patuxent River 02131106

Non-Tidal Nutrients (WQA)

Approved:
Feb. 21, 2007
Middle Patuxent River

02131106

Sediments (WQA)

EPA Concurrence:
December 7, 2010

Middle Patuxent River

02131106

Zinc (WQA)

Approved:
July 2, 2009
Miles River 02130502

Bacteria

Approved:
Sept. 27, 2005
Miles River
(extended restricted shellfish harvesting area)
02130502

Bacteria

Approved:
Sept. 9, 2010
Monie Bay 02130302

Bacteria (WQA)

EPA Concurrence:
May 9, 2005
Monie Bay 02130302 Bacteria

Approved:
March 30, 2011

Nanticoke River 02130305

Bacteria

Approved: 
June 11, 2008

Needwood Lake 02140206

Nutrients (WQA)

EPA Concurrence:
January 22, 2003
Newport Bay 02130105

Nitrogen and Phosphorus

Approved:
August 7, 2014

Newport Bay 02130105

Bacteria (WQA)

EPA Concurrence:
May 9, 2005
Northeast River 02130608

Nutrients

Approved: 
Jan. 12, 2005
Northeast River 02130608

Zinc (WQA)

Approved:
Dec. 17, 2005
Northeast River 02130608

Lead (WQA)

Approved:
Feb. 20, 2009
Northeast River 02130608

PCBs

Approved:
March 22, 2011
Patuxent River Mesohaline, Oligohaline, & Tidal Fresh Segments​​
20131101
02131102

PCBs

Approved:
September 19, 2017
Patuxent River Middle 02131102

Chlorpyrifos (Pesticide)

EPA Concurrence:
July 3, 2007
Patuxent River Upper 02131104

Non-tidal Nutrients (WQA)

Approved:
Feb. 21, 2007
Patuxent River Upper 02131104 Bacteria

Approved:
August 9, 2011

Patuxent River Upper, Cash Lake 02131104 Mercury

Approved:
March 18, 2011

Patuxent River Upper 02131104 Sediments

Approved:
Sept. 30, 2011

Piney Run Reservoir 02130908

Sediments (WQA)

EPA Concurrence:
December 18, 2003

Piney Run Reservoir 02130908

Phosphorus2 (WQA)

EPA Concurrence:
Jan. 20, 2005

Piscataway Creek 02140203

Bacteria

Approved:
Sept. 20, 2007

Pocomoke Sound 02130201

Fecal Coliform

Approved:
April 15, 2009
Port Tobacco River 02140109

Nutrients

Approved:
March 18, 1999

Potomac River, Lower Tidal 02140101

PCBs

Approved:
Oct. 31, 2007

Potomac River, Middle Tidal 02140102

Copper, Cadmium, Chromium, Lead (WQA)

Approved:
June 6, 2006

Potomac River, Middle Tidal 02140102

PCBs

Approved:
Oct. 31, 2007

Potomac River, Upper Tidal 02140201

Copper (WQA)

Approved:
July 7, 2006

Potomac River, Upper Tidal 02140201

PCBs

Approved:
Oct. 31, 2007

Potomac River Montgomery County 02140202 Sediments Approved:
June 19, 2012
Potomac River Montgomery County 02140202 Nutrients (WQA) EPA Concurrence:
May 18, 2012
Potomac River Washington Co

02140501

Nutrient (Phosphorus) (WQA)

Approved:
Feb. 1, 2011

Potomac River Washington Co

02140501

Sediment

Approved:
Sept. 30, 2011

Prettyboy Reservoir 02130806

Non-Tidal Bacteria

Approved:
Oct. 8, 2009
Prettyboy Reservoir 02130806

Mercury

Approved:
August 16, 2004
Prettyboy Reservoir 02130806

Nutrients

Approved:
Mar. 27, 2007

Prettyboy Reservoir 02130806

Heavy Metals (WQA)

EPA Concurrence:
Nov. 10, 2003

Rock Creek 02140206

Bacteria

Approved:
July 30, 2007
Rock Creek 02140206 Nutrients (Phosphorus)

Approved:
Sept. 26, 2013

Rock Creek 02140206 Sediments Approved:
Sept. 29, 2011
Rock Creek in the Patapsco River Basin 02130903

Bacteria (WQA)

EPA Concurrence:
May 9, 2005
Rocky Gorge Reservoir/T. Howard Duckett Reservoir(Patuxent River) 02131107

Phosphorus

Approved: 
Nov. 24, 2008

Rocky Gorge Reservoir (Patuxent River) 02131107

Mercury (WQA)

EPA Concurrence:
February 5, 2015

Sassafras River 02130610

Nutrients

Approved:
April 1, 2002
Sassafras River 02130610

PCBs

Approved:
March 22, 2011
Savage River Reservoir 02141006

Mercury

Approved:
Jan. 29, 2004

Savage River 02141006

Low pH

Approved: 
April 17, 2008 

Revised Final Approved:
February 10, 2011

Savage River 02141006

Nutrients (WQA)

Approved:
April 16, 2001

Seneca Creek 02140208

Sediment

Approved:
Sept. 30, 2011
Seneca Creek 02140208

Nutrients (WQA)

Approved:
Sept. 23, 2009
Severn River 02131002

Bacteria

Approved: 
April 10, 2008

Severn River Mesohaline Segment 02131002 PCBs Approved:
July 19, 2016
Sinepuxent Bay 02130104

Bacteria (WQA)

EPA Concurrence:
May 9, 2005
Sinepuxent Bay 02130104

Nitrogen and Phosphorus

Approved:
August 7, 2014

South River 02131003

Bacteria

Approved:
Nov. 4, 2005

South River 02131003 PCBs Approved:
April 27, 2015
South River ​02131003 ​Sediment Approved:
September 28, 2017
Southeast Creek (Chester River) 02130508

Fecal Coliform

Approved: 
June 11, 2008

Southeast Creek (Chester River) 02130508

Phosphorus

Approved:
Sept. 22, 2003
St. Clements Bay 02140105

Bacteria

Approved:
June 7, 2005
St. Mary's Lake 02140103

Mercury

Approved:
Feb. 23, 2004

St. Mary's Lake 02140103

Nutrients (WQA)

EPA Concurrence:
Feb. 27, 2003
St. Mary's River 02140103

Bacteria

Approved:
May 25, 2005
Stillpond Creek 02130611

Nutrients

Approved:
March 25, 2002
Swan Creek 02130706

Nutrients

Approved:
March 27, 2002
Swan Creek 02130706

Sediments

Approved:
Sept. 30, 2016
Tangier Sound
(One Restricted Shellfish Harvesting Area)
02130206

Bacteria

Approved:
Aug. 2, 2006

Tony Tank Lake 02130301

Phosphorus & Sediments

Approved:
Dec. 10, 1999
Town Creek 02140512

Nutrients (WQA)

Approved:
Aug. 10, 2006

Town Creek 02140512

Sediments (WQA)

Approved:
Dec. 27, 2006

Town Creek (Choptank River) 02130403

Nutrients & BOD

Approved:
Oct. 16, 2003
Transquaking River 02130308

Nutrients

Approved:
March 9, 2000
Triadelphia Reservoir (Patuxent River) 02131108

Phosphorus & Sediments

Approved: 
Nov. 24, 2008
Tuckahoe Lake 02130405

Mercury

Approved:
Jan. 27, 2004

Unnamed Pond and Tributary of La Trappe Creek (Choptank River) 02130403

Phosphorus & BOD

Approved:
Sept. 16, 2003
Urieville Lake 02130509

Phosphorus & Sediment

Approved:
Aug. 24, 1999
Upper Chester River (Duck Neck Beach) 02130510

Bacteria

Approved:
March 18, 2011
Upper Monocacy River 02140303

Bacteria

Approved: 
Dec. 3, 2009
Upper Monocacy River 02140303

Nutrients

Approved:
May 7, 2013
Upper Monocacy River 02140303

Sediments

Approved: 
Dec. 3, 2009 
Upper North Branch of the Potomac River 02141005 Iron and Aluminum Approved:
Feb. 15, 2011
Upper North Branch Potomac River 02141005

Low pH

Approved: 
April 17, 2008
Upper North Branch Potomac River 02141005

 Sediments

Approved:
May 15, 2007

Upper North Branch Potomac River 02141005

Nutrients (WQA)

Approved:
Aug. 10, 2006

Upper North Branch Potomac River 02141005

Metals (WQA)

Approved:
Nov. 15, 2006

Upper Pocomoke River 02130203

Phosphorus

Approved:
September 30, 2013
Upper Pocomoke River 02130203

Sediments

Approved:
November 15, 2013
West Chesapeake Bay Drainage 02131005

Bacteria

Approved:
Feb. 20, 2006

West Chesapeake Bay Drainage ​02131005 ​Sediment ​Public Review ended October 12, 2017
West River 02131004

Bacteria

Approved:
Feb. 20, 2006
West/Rhode Rivers 02131004 PCBs Approved:
January 8, 2016
Western Branch, Patuxent 02131103

BOD

Approved:
June 6, 2000
Wicomico Creek 02130303

Nutrients

Approved:
Jan. 29, 2001
Wicomico River Headwaters 02130304

Bacteria

Approved:
Sept. 20, 2007

Wicomico River 02140106

Bacteria

Approved:
May 25, 2005
Wills Creek 02141003

Low pH

Approved:
April 17, 2008
Wills Creek 02141003

Cyanide (WQA)

Approved:
Aug. 16, 2006

Wills Creek 02141003

pH (WQA)

Approved:
Dec. 16, 2005

Wills Creek 02141003

Non-tidal Bacteria

Approved:
Nov. 6, 2007

Wills Creek 02141003

Nutrients (WQA)

Approved:
March 15, 2010
Wills Creek 02141003

 Non-tidal Sediments

Approved:
Jan. 16, 2007

Worton Creek 02130611

Nutrients

Approved:
Feb. 6, 2002
Wye River 02130503

Bacteria

Approved:
Feb. 29, 2008
Youghiogheny River 05020201

Low pH

Approved: 
Sept. 20, 2007
Youghiogheny River 05020201

Non-tidal Sediments

Approved:
Feb. 21, 2007

Youghiogheny River 05020201

Nutrients (WQA)

EPA Concurrence:
April 16, 2001
Youghiogheny River, Cherry Creek 05020201

Non-Tidal Bacteria

Approved:
Sept. 23, 2009
Zekiah Swamp 02140108

Copper, Selenium, Zinc, Lead (WQAs)

Approved:
Sept. 11, 2006

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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 Melissa Chatham at (410) 537-3937.

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