On Monday, September 21, 2026 through Friday, October 2, 2026, Pennichuck will be performing a series of fire flow tests throughout the Litchfield, Londonderry, and Nashua Core Systems. These fire flow tests are being performed due to system improvements. Technicians will be flushing hydrants to dispel naturally occurring sediment and air from the main. Residents who experience discolored water should run their cold water for approximately 10 minutes. If the issue persists, please call Customer Service at 800-553-5191. Residents who have any questions regarding the fire flow test schedule, please call 603-202-0448. Thank you for your patience as we work to protect the quality of your water.