Final TMDLs Approved by EPA: St. Mary's River

St. Mary's River is situated approximately 15 km upriver from the mouth of the Potomac River along its northeast shoreline. The shellfish waters include the tidal waters of the St. Mary's River and its tributaries in St. Mary's County, Maryland from the headwaters to its confluence with the Potomac River.

St. Mary's River (basin number 02140103) was first identified on the 1996 303(d) list submitted to the EPA by MDE as being impaired by nutrients, bacteria and sediments, and listings of biological impacts in non-tidal portions and metals added in 2002. On the draft 2004 303(d) List, specific restricted shellfish harvesting areas were identified. The document available below establishes TMDLs of fecal coliform bacteria in St. Mary's River within the Lower Potomac River basin.  The nutrient, sediment and biological 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 St. Mary's River Basin in St. Mary's County, MD

(Approved on May 25, 2005)

EPA's Decision Letter EPA's Decision Letter
Main Report TMDL_stmarysriver_fc.pdf (3439KB)

Comment Response Document

CRD_stmarysriver_fc.pdf (107KB)

Contact Information

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