Water Quality Analyses (WQA) with EPA Concurrence of MDE's Findings: Lower Susquehanna River

Lower Susquehanna River is located in Cecil and Harford County, Maryland and flows from the outlet of the Conowingo Dam south into the headwaters of the Chesapeake Bay.  The Lower Susquehanna River, Deer Creek, Octoraro Creek, and Broad Creek are all part of the network of streams that make up the basin.  Lower Susquehanna River is approximately 10 miles in length, with a watershed area of approximately 19,885 acres.

Lower Susquehanna River (basin code 02120201) was identified on the State’s 303(d) list as impaired by nutrients (1996), suspended sediments (1996), cadmium (Cd) (1996), polychlorinated biphenyls (PCBs) (2002) and for impacts to biological communities (2002).  All impairments were listed for the tidal waters except for the impacts to biological communities, which are listed for the non-tidal region.  A Water Quality Analysis (WQA) of Cd for the tidal waters of Lower Susquehanna River, available below,  was conducted by the Maryland Department of the Environment (MDE) using recent water column chemistry data, sediment chemistry data and sediment toxicity data.  The listings for suspended sediments, PCBs, and impacts to biological communities will be addressed separately at a future date.  A WQA for nutrients was completed in 2005.

Water Quality Analysis of Cadmium in Lower Susquehanna River, Cecil and Harford County, Maryland

(Concurrence: August 20, 2009)

EPA's Decision Letter EPA's Decision Letter

Main Report 

WQA_lowersusquehanna_cadmium.pdf (468KB)

Comment Response Document

CRD_lowersusquehanna_cadmium.pdf (9.6KB)

Contact Information

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