Final TMDLs Approved by EPA: Liberty Reservoir

​The Liberty Reservoir watershed is located in the Patapsco River basin of Maryland with a total drainage area of 104,800 acres (163.75 square miles). The majority of the watershed is located in Carroll County, MD with a portion in Baltimore County, MD. The North Branch Patapsco River is the main tributary flowing into and out of Liberty Reservoir. The river’s west branch begins north of Westminster and the east branch begins south of Manchester. Flowing south, the river becomes Liberty Reservoir, a drinking water supply for Carroll and Baltimore Counties, and Baltimore City. The major tributaries include Beaver Run, Morgan Run, Middle Run, and Little Morgan Run.
The Maryland Department of the Environment (MDE) has identified the tributaries of Liberty Reservoir in the State of Maryland’s 303(d) List as impaired by fecal bacteria and impacts to biological communities (listed in 2002). The reservoir itself is not listed as impaired by fecal bacteria, but is listed as impaired by nutrients and sediments (listed in 1996) and by methylmercury (listed in 2002). The mainstem North Branch Patapsco River, mainstem West Branch Patapsco River and Cranberry Branch and its tributaries have been designated as Use IV-P (Recreational Trout Waters and Public Water Supply) waters. Roaring Run has been designated as Use III (Nontidal Cold Water). Beaver Run, Cooks Branch, East Branch Patapsco River, Keysers Run, Locust Run, Morgan Run, Norris Run and all their tributaries have been designated as Use III-P (Nontidal Cold Water and Public Water Supply). Liberty Reservoir and all remaining tributaries have been designated as Use I-P (Water Contact Recreation, Protection of Aquatic Life, and Public Water Supply). See Code of Maryland Regulations (COMAR) Chromium and lead impairments (listed in 1996) have been removed from the 303(d) List through a water quality analysis (WQA) submitted to EPA in September 24, 2003. The document, available below, establishes a TMDL for fecal bacteria in the Liberty Reservoir watershed that will allow for attainment of the beneficial use designation of primary water contact recreation. The listing for sediments, nutrients, methylmercury in fish tissue, and impacts to biological communities will be addressed separately at a future date. MDE monitored the Liberty Reservoir watershed from 2003 to 2004 for fecal bacteria. A data solicitation for fecal bacteria was conducted by MDE in 2003, and all readily available data from the past five years were considered.

Revised Final Document for Public Comment

On December 3, 2009, the U.S. Environmental Protection Agency (EPA) approved the "Total Maximum Daily Loads (TMDLs) of Fecal Bacteria for Liberty Reservoir, Carroll and Baltimore Counties, Maryland," developed by the Maryland Department of the Environment. 
BTR Hampstead, LLC, 102 W. Pennsylvania Ave., Suite 302, Towson, MD 21204 and Carroll County Bureau of Utilities, 225 North Center Street, Westminster MD 21157 jointly submitted an application to be co-permittees for renewal of a permit to discharge an average of 217,000 gallons per day (gpd) of treated sanitary wastewater, noncontact cooling water, wastewater from remediation of contaminated groundwater, and variable amounts of stormwater from an industrial park, located at 626 Hanover Pike, Hampstead, MD to Deep Run (a Use I-P tributary to North Branch Patapsco River) though Outfall 001. 
The permit application also proposes that the BTR Hampstead, LLC sanitary wastewater will be redirected for treatment to the Hampstead Wastewater Treatment Plant (WWTP) located at 4455 North Woods Trail, Hampstead MD 21074 (16-DP-0594, MD0022446) through an existing pumping station located at the adjacent Jos. A. Bank facility. Additionally, a new pumping station and force main will be installed to redirect up to 600,000 gpd of the Hampstead WWTP treated wastewater, after being upgraded to Enhanced Nutrient Reduction Technology, to the existing BTR Hampstead, LLC Outfall 001. After redirection of both these waste streams, a total combined flow of 817,000 gpd will be discharged to the unnamed tributary to Deep Run through Outfall 001.
As a result of this permit request, the text of the TMDL has been modified to include the updated permit information.  No numeric changes have occurred to the allocations or the overall total TMDL.  These documents along with the permit were available for public comment.  The public comment period was held from March 9 to June 16, 2017.  No comments were received related to the TMDL documents.  The USEPA accepted the revisions on November 13, 2017.

Total Maximum Daily Loads of Fecal Bacteria for Liberty Reservoir in Carroll and Baltimore Counties, Maryland

(Approved on December 3, 2009)

Portable Document Format

​​EPA Acceptance of Revisions Letter EPA's_Acceptance_Letter.pdf (362 KB)
Revised Main Report Liberty_Reservoir_Bacteria_TMDL_Revised_Final.pdf (3,433 KB)
EPA's Decision Letter EPA's Decision Letter
Main Report Liberty_Reservoir_Bacteria_TMDL_Final.pdf (3330KB)
Comment Response Document Liberty_Reservoir_Bacteria_CRD_Final.pdf​ (42KB)

​Contact Information 

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