The City of Baltimore through its Department of Public Works, Water and Wastewater Engineering Division, and Water Facilities Section was committed to improving the quality and reliability of tap water delivered to portions of northern Baltimore City and southeastern Baltimore County through the Guilford Reservoir, a part of Baltimore's drinking water supply system. During routine water quality monitoring by the United States Environmental Protection Agency (USEPA) and the Maryland Department of the Environment, high levels of chlorine concentration were detected in the Stony Run River. It was suspected that the chlorine was being discharged from the storm drains surrounding the Guilford Reservoir. To determine the best way to preserve the integrity the city's drinking water, the City of Baltimore, owner of the 36 million gallon, 20-foot-deep reservoir built in 1893, retained Savin Engineers to conduct water quality samplings and manhole inspections to locate the source of the chlorine. Results of the field tests indicated that the chlorine was coming from a floor drain in one of the chlorinator rooms at the reservoir. Based on the information contained within Savin's report, the City of Baltimore will make a determination about the best way to proceed to mitigate this, and other issues at the Guilford Reservoir, which must then be approved by the Environmental Protection Agency.