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.

Nashua Fall Flushing, Part Two

Overnight flushing scheduled from 10:00 p.m. to 6:00 a.m., beginning October 12, 2026, and ending the morning of October 19, 2026.

From Fairway St. south to the MA border. From Research Dr. east to the Merrimack River.

Nashua Fall Flushing, Part Two

Nashua Fall Flushing, Part Two

Overnight flushing scheduled from 10:00 p.m. to 6:00 a.m., beginning October 12, 2026, and ending the morning of October 19, 2026.

OFFICE HOURS

Go Green

WATERTIGHT PROTECTION PLAN