Final TMDLs Approved by EPA: South River

The South River is a 10-mile-long tidal tributary of the Chesapeake Bay in Anne Arundel County, Maryland. From its headwaters in western Anne Arundel County, in the vicinities of Crofton, Millersville and Crownsville, the river enters the Chesapeake Bay south of the historic port city of Annapolis. Its major non-tidal branches include the North River and Bacon Ridge Branch. The drainage area of the South River is approximately 146 square kilometers (36,126 acres).

Maryland water quality regulations specify that all surface waters of the State shall be protected for water contact recreation, fishing, and protection of aquatic life and wildlife. The designated use of the waters of the South River is Use II – Support of Estuarine and Marine Aquatic Life and Shellfish Harvesting. The Maryland Department of the Environment (MDE) has identified the waters of the South River (Integrated Report Assessment Unit ID: MD-SOUMH) on the State's 2012 Integrated Report as impaired by nutrients (nitrogen & phosphorous) for the South River Mesohaline Segment (1996), fecal coliform for the shellfish restricted areas in the South River (1996), polychlorinated biohenyls (PCBs) in fish tissue (2002) and impacts to biological communities (2008). 

The fecal coliform TMDLs for the shellfish restricted areas in the South River watershed were approved by EPA in 2005. The Chesapeake Bay TMDL, which was approved by the EPA in December 2010, addressed the nutrient listing for the South River Mesohaline Segment. The listing for impacts to biological communities will be addressed at a future date.

The document, available below, establishes a total PCB (tPCB) TMDL for the tidal waters of the South River, for which a data solicitation was conducted, and all readily available data from the past 5 years have been considered.

Total Maximum Daily Loads of Polychlorinated Biphenyls in in the South River Mesohaline Chesapeake Bay Tidal Segment in Anne Arundel County, Maryland

(Approved on April 27, 2015)

EPA's Decision Letter EPA's Decision Letter
Main Report

South_River_PCB_TMDL_fa.pdf (1,500KB)

Comment Response Document

South_River_PCB_TMDL_CRD_fa.pdf (480KB)

Contact Information

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