Final TMDLs Approved by EPA: Potomac River Lower

The Potomac River is located on the Chesapeake Bay’s western shore.  Two restricted shellfish harvesting areas within the Potomac River Lower Tidal Basin are addressed in the report available below.  Tall Timbers Cove and Whites Neck Creek are situated approximately 30 and 50 km, respectively, upriver from the mouth of the Potomac River along its northeast shoreline.    

The Potomac River Lower Tidal (basin number 02140101) was first identified on the 1996 303(d) list submitted to the Environmental Protection Agency (EPA) by Maryland Department of the Environment (MDE) as impaired by nutrients and sediments, with listings of toxics in the tidal portions added in 2002, and listings of fecal coliform in the tidal portion and biological impacts in non-tidal portions added in draft 2004 303(d) List.  The document establishes TMDLs of fecal coliform at two restricted shellfish harvesting areas in the Potomac River Lower Tidal Basin:  Tall Timbers Cove and Whites Neck Creek.  These restricted shellfish harvesting areas are impaired by levels of bacteria exceeding Maryland's water quality standards for fecal coliform, which has resulted in closure of the areas to shellfish harvesting.  The nutrient, sediment, toxic, biological, and any remaining bacteria impairments within the basin will be addressed at a future date. 

Total Maximum Daily Loads of Fecal Coliform  for Restricted Shellfish Harvesting Areas in the Potomac River Lower Tidal Basin in St. Mary's County, Maryland

(Approved on May 25, 2005)

EPA's Decision Letter EPA's Decision Letter
Main Report TMDL_lowerpotomac_fc.pdf (2228KB)

Comment Response Document

CRD_lowerpotomac_fc.pdf (102KB)


Contact Information

Please direct questions or comments concerning this project to Maryland's TMDL Program at (410) 537-3818.