Residual Control Technology Saves Millions of Gallons of Water While Maintaining Consistent Chloramine Residual Levels Case Study
Loudoun water in Northern Virginia has a history of embracing change and seizing opportunities to create a more robust and sustainable water system. Situated in the fast-growing suburbs of Washington D.C., Loudoun Water provides chloraminated drinking water to over 65,000 households through a networkcomprisedof more than 1,200 miles of pipes and seven water storage tanks. A key element of Loudoun Water’s mission to sustainably manage water resources has been its efforts to improve the operational efficiency of its drinking water system. For a chloraminated water system, that means getting control of nitrification.
Loudoun Water used to be a simple secondary system, blending free-chlorine drinking water from the City of Fairfaxwithchloraminated water from neighboring Fairfax County. Due tothe growthin its service area, Loudoun County continued to expand itscapabilitiesby building additional transmission mains and storage capacity that culminated with the construction of the Dulles South Tanks, a pair of 3-MG fluted compositetanks serving the southern portion of its system(Figure 1).