Water System

The East Valley Water System serves more than 20,000 service connections throughout the 293 miles of water pipeline. On average, the district provided 21,000 acre feet of water this year.

This is equal to 18.7 million gallon per day average, but keep in mind that on warm days the demand for water is very high, and on cooler days it is much less.

Water System Flushing


Water Main Flushing is a process in which pipes are cleaned by forcing water through at high speeds. Flushing removes sediment that can cause water to appear dirty or discolored, helping to improve the water’s taste. East Valley Water District water quality staff will open fire hydrants and allow water to flow out uninterrupted for 5-10 minutes. This is an important part of maintaining a healthy drinking system. To view an interactive map with flushing and valve exercising activities occurring in the District, click here.

Why is Flushing Needed?


Many of the district’s large water mains were installed in the 1960s. As part of our efforts to provide the highest quality water possible, the pipes must be cleared of sediment that may accrue along the bottom of the pipe over years of use and make sure that water does not sit stagnant in the pipes for an extended period of time. Because pipes must be flushed at high speeds in order to use the natural water pressure to clean the pipe, you will typically see this function take place using a fire hydrant.

Will Flushing Affect Your Water Service?


Water service will not be interrupted during pipe flushing, but you may notice lower water pressure while it is taking place.

What to do After Flushing Work is Finished


When flushing work is done in your area, we recommend running a faucet for one or two minutes, or until your water runs clear. We encourage you to collect this water and use it to water plants, instead of letting it run down the drain. System flushing will not correct private plumbing or corrosion problems.

For more information about the flushing program or to report discolored water conditions that have not cleared up within 24 hours after flushing activity, please contact Mike Hurst, Water Quality Coordinator at (909) 772-5154.