Final TMDLs Approved by EPA: Patuxent River Polychlorinated Biphenyls (PCBs) TMDL

The Patuxent River is a tidal tributary of the Chesapeake Bay located in Maryland’s Western Shore that drains portions of Anne Arundel, Calvert, Charles, Frederick, Howard, Montgomery, Prince George’s and St. Mary’s Counties.  The tidal river consisting of the Patuxent River Mesohaline (PAXMH), Patuxent River Oligohaline (PAXOH), and Patuxent River Tidal Fresh (PAXTF) tidal segments has a length of approximately 70 kilometers (km). 
Maryland Water Quality Standards (WQSs) 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 class of the waters of the PAXMH, PAXOH, and PAXTF tidal segments is Use Class II – Support of Estuarine and Marine Aquatic Life and Shellfish Harvesting. 
The Maryland Department of the Environment (MDE) has identified the waters of the PAXMH, PAXOH, and PAXTF tidal segments on the State's 2014 Integrated Report of surface water quality as impaired for Polychlorinated Biphenyls (PCBs).  The TMDL established herein by MDE will address total PCB (tPCB) listings for the PAXMH, PAXOH, and PAXTF tidal segments, for which a data solicitation was conducted, and all readily available data have been considered.
Total Maximum Daily Load of Polychlorinated Biphenyls in the Patuxent River Mesohaline, Oligohaline and Tidal Fresh Chesapeake Bay Segments
(Approved on September 19, 2017)
EPA's Decision Letter
Main Report
Comment Response Document

Contact Information

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