Why does the City flush water mains? Isn't that a waste of water?

Water mains are sized to allow adequate and safe flows for fire protection.  Water typically moves through the system at less than two miles per hour.  This slow movement allows minerals, such as iron floc, to settle out and accumulate in pipes over time.  The build-up can restrict water flow and contributes to corrosion and water color problems. Periodic flushing of water pipes removes the mineral deposits which helps maintain the distribution system and assures consistent, high quality water.  In addition to removing this build-up, our flushing program allows the identification of any inefficiencies through the water system such as closed valves that might prevent us from distributing water at adequate pressures to all customers.   Flushing also ensures fire hydrants will produce ample flow for fire protection services.

It may seem counterintuitive to waste water by flushing fire hydrants.   However, it is necessary to periodically flush water through the distribution system in order to protect the quality of your drinking water.  The amount and cost of water used in flushing is a small price compared to the benefits of water quality and maintenance of infrastructure.  To minimize the loss of the water, our flushing program is designed to incorporate springtime irrigation use. 

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1. My water bill is high compared to last month and we have not done anything different. Where did the water go?
2. What do I do if I have a water emergency after hours?
3. My water appears dirty or has a yellow color to it. What should I do?
4. How do I know my water is safe?
5. My water pressure seems low or I have low flow. What could be the problem?
6. When can I water my yard?
7. How can I purchase bulk water?
8. Where is my meter located?
9. Where is my water shut-off?
10. Where does my water come from?
11. Do Irrigation Systems in Moscow Require Backflow Protection and Annual Testing?
12. Is there lead or copper in my water?
13. Is there Fluoride in my water?
14. Why does the City flush water mains? Isn't that a waste of water?
15. How do I view the City's Annual Water Quality Report?