Water Quality Analyses (WQA) with EPA Concurrence of MDE's Findings: Jones Falls

The Jones Falls watershed is located in the Upper Western Shore region of the Chesapeake Bay watershed within Maryland. 

The Jones Falls (basin code 02130904) was identified on the State’s 1996 list of water quality limited segments (WQLSs) as impaired by nutrients, suspended sediments, zinc, copper, lead and chlordane. The report available below provides an analysis of recent monitoring data, which shows that the aquatic life criteria and designated uses associated with zinc are being met in the Jones Falls. This analysis supports the conclusion that a TMDL of zinc is not necessary to achieve water quality standards in this case. Barring the receipt of any contradictory data, the report will be used to support the removal of Jones Falls from Maryland’s list of WQLSs for zinc when MDE proposes the revision of Maryland’s 303(d) list for public review in the future. The chlordane impairment was addressed by a TMDL analysis in relation to a fish tissue impairment in Lake Roland. Water quality analyses were conducted in 2003 for the copper and lead impairments.  A fecal bacteria TMDL was completed in 2006.  The remaining nutrient and suspended sediment listings will be addressed separately at a future date. 

WQA of Zinc Contamination for the Jones Falls, Baltimore City and Baltimore County, MD

(Concurrence February 20, 2003)

EPA's Decision Letter

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.