NMWD’s Annual Water Quality Flushing Program 2026

(Posted January 6, 2026) NMWD will begin its annual water main flushing program next week in the Zone 3 areas. This is a standard practice to ensure there is no degradation in water quality and to maintain an adequate chlorine residual (disinfectant) which helps prevent any bacterial growth in the pipelines. Customers may temporarily experience low water pressure or a slight, but harmless color in their water when the flushing is conducted in their neighborhood. NMWD crews have developed specific routes and use of isolation valves to maximize results using the least amount of water possible. Flushing is performed in the winter months when there is sufficient water supply for the task. All NMWD fire hydrants are inspected and tested as part of ongoing distribution maintenance. In addition, our annual water quality flushing program allows a more in-depth performance test on select hydrants and areas.

For more information on water quality visit https://nmwd.com/your-water/water-quality/.