Water Quality Analysis of Zinc and Lead in Bodkin Creek, Anne Arundel County, Maryland

Water Quality Analyses (WQA) with EPA Concurrence of MDE's Findings: Bodkin Creek

The Bodkin Creek watershed is located on the western shore of the Chesapeake Bay, near the confluence of the Patapsco River and the Chesapeake Bay. The watershed has 896 acres of open water and drains 5,683 acres of land within Maryland’s Western Shore.  It is located in Anne Arundel County and is bounded by the Baltimore Harbor watershed to the west and by the Chesapeake Bay proper to the east.  Bodkin Creek proper is composed of three small creeks Back Creek, Main Creek, and Wharf Creek with ninety percent of the watershed being tidal.   Of the approximately 24 stream miles in the watershed only 2.5 miles of Main Creek’s headwaters is non-tidal. The tidal portion of the river is approximately 24.01 miles (38.6 km) in length, from its confluence with Chesapeake Bay.  The depths of the river range from about 6 inches (0.15 m) in the headwaters to greater than 8-10 feet (2.4-3.0 m) at the middle of the river.  At the mouth of the river, the depth ranges from 7-9 feet (2.1-2.7 m).   

Bodkin Creek (basin code 02130902), located in Anne Arundel County, was identified on the State’s list of water quality limited segments (WQLSs) as impaired by nutrients (1996 listing), suspended sediments (1996 listing), copper (Cu) (1996 listing), zinc (Zn) (1996 listing), lead (Pb) (1996 listing), and impacts to biological communities (2004 listing).  All impairments were listed for the tidal waters except for impacts to biological communities, which are listed for the non-tidal region. 

The report available below provides an analysis of recent monitoring data, including hardness data, which shows that the aquatic life uses and criteria are being met in Bodkin Creek watershed, and 303(d) impairment listings associated with Zn and Pb are not supported by the analyses contained herein.  The analyses support the conclusion that a TMDL for Zn and Pb is not necessary to achieve water quality standards.  Barring the receipt of any contradictory data, the report will be used to support the removal of Bodkin Creek from Maryland’s list of WQLSs for Zn and Pb when the Maryland Department of the Environment (MDE) proposes the revision of Maryland’s 303(d) list for public review in the future.  The listings for nutrients, suspended sediments, Cu, and impacts to biological communities will be addressed separately at a future date.

Water Quality Analysis of Zinc and Lead in Bodkin Creek, Anne Arundel County, Maryland

(Concurrence February 20, 2009)

EPA's Decision Letter EPA's Decision Letter

Main Report 

WQA_BodkinCreek_Zn_Pb.pdf (587KB)

Comment Response Document

CRD_BodkinCreek_Zn_Pb.pdf (7KB)

 

Contact Information

Please direct questions or comments concerning this project to Maryland's TMDL Program at (410) 537-3572.