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Annual Water Line Flushing

The City of Mountain View Public Services Division is conducting its annual water system flushing program throughout the City and expects to clean 180  miles of water mains (pipes) by March 2019. The City will post signs in affected neighborhoods prior to flushing.


Flushing is the process of cleaning or scouring the mains by flowing water at high velocity to remove sediment and discharge water that becomes “stale” after remaining in the water mains for an extended period of time. Water movement may be further reduced as conservation increases, requiring more frequent flushing to maintain water quality throughout the City.


Flushing accounts for approximately 0.1% of overall water use in Mountain View. The City is constantly working to minimize water loss and identify opportunities and technologies that will help save and reuse the water used in the flushing process.


If you would like more information about the City's water system flushing or water conservation strategies, or have questions or concerns while City personnel are in your neighborhood, please contact the Public Services Division at (650) 903-6329.

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