For more than 130 years, Lake Massabesic has served as the water supply for Manchester and portions of six surrounding communities. In order to satisfy stringent state and federal drinking water regulations, the lake water is purified at Manchester's Water Treatment Plant. This facility was completed in 1974 and has since been routinely updated with state-of-the-art equipment to improve quality control and operational efficiency and was significantly upgraded in 2006. Located adjacent to Lake Massabesic, the plant treats all of the City's water before it is pumped into a 490-mile piping network for distribution to homes and industries.
The plant has a maximum hydraulic capacity of 50 million gallons per day and presently delivers in excess of 17 million gallons per day to approximately 160,000 consumers in the greater Manchester area. Manchester's modern treatment facility has been designed to treat a wide range of water quality problems to ensure that the customer receives the best possible drinking water.