Water Main Flushing June 10-11

hydrantWaterloo Utilities maintains over 190 hydrants and is required by the DNR to flushing each hydrant annually.

Flushing will begin on June 10th and be completed on June 11th. 

There are many benefits received from flushing hydrants:

  • Enhances water quality by removing sediments from mainline pipes,
  • Helps to find any weaknesses in the water system,
  • Confirms that fire hydrants and valves are operating correctly,
  • Aids in identifying closed valves and weak flows in the water main, AND
  • Makes sure there is ample water flow for fighting fires.

Although this flushing is essential to provide high water quality and prevent long-term sedimentation and discoloration issues, it can cause short-term discoloration as the sediment is disturbed due to the higher water flows.

When flushing is being done near your residence or business you may lose water pressure. During and immediately after flushing the water may look “rusty”.  If discolored water occurs it is caused by the iron particles being dislodged from the water main. Businesses should take extra caution with ice machines and similar equipment that uses water. You may wish to draw water before hand if this will be an issue for you. The discolored water can stain porcelain and laundry. It is recommended not to do laundry or other projects that may suffer from discolored water. When sediment gets stirred up in the water system, the resulting discoloration will typically last approximately 2-4 hours or less. After this time, the sediment will settle back out and the water will become clear. You can speed up the process by turning on an outside spigot or a cold water tap in the lowest level of your home, and let the water flow until it clears. During these periods, it’s important to try to avoid using hot water, as the sediment can be drawn into your hot water heater’s water tank, which could require you to have to flush the tank later. Screens on faucets may get clogged and need to be cleaned.

We ask for your patience and understanding during this critical water main cleaning process. If you have any questions or comments, please contact the office.