Town of Greenburgh Consolidated Water District No. 1, serving Greenburgh in Westchester County, west of New York, serves approximately 39,993 people via 11,500 service connections, pumping seven million gallons per day on average.
For decades, the district had been using chlorine gas to manage residual chlorine in the water, sourced mainly from New York City’s Kensico Reservoir via the Delaware Aqueduct. In 2012, the city installed a UV-treatment plant above the point where the district drew its water, so it could lower the amount of chlorine used in disinfecting the water — and lower the amount of chlorine by-products in the water. Read the full case study to learn more.