On Monday, May 18, 2026, the Manchester Water Works (MWW) will begin a planned six-week hydrant flushing program and chlorine conversion system-wide throughout our five-hundred (500) plus miles of water mains within the MWW water distribution system.
The flushing program will be conducted between the hours of 10:00 p.m. and 6:00 a.m., Sunday through Thursday, in order to minimize inconvenience to customers. Mark Bourque, Deputy Director, Distribution indicates that this annual program is to help improve water quality. The flushing will begin at the Lake Shore Road Water Treatment Plant in east Manchester and progress westerly over the six-week period across the city and areas of the six surrounding towns which MWW serves. Heavy Commercial users will be notified prior to work being done in their immediate area and we request that residential customers with special needs, such as in-house dialysis equipment, call our Department to make their locations known so that they also may be notified in advance of flushing in their area.
Customers may experience a slight discoloration of water during flushing due to increased velocity and reversed flow of the water in the pipelines. MWW regrets that the program may inconvenience some customers, but flushing is a necessary function of the departments’ preventive maintenance program. If you experience discoloration of your water, run cold water from a bathtub or outside spigot for ten to fifteen minutes or until the water clears. If the problem persists, please call the number below.
With questions regarding the chlorine conversion please call (603) 792-2855: flushing program, (603) 792-2807.