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Have a Water Emergency? 

Call our 24-hour Water Response Service at 408-730-7400 to report:

The City maintains water mains located in the streets. If a leak or other issue occurs in the pipes that connect the water meter to the house, it is the property owner's responsibility to fix it. 

How to Shut Off Water at Your Home

If there’s an emergency and you need to turn off the water to your home, look for a shutoff valve, typically located at the front of the house near a hose bib. 

If you cannot find a shutoff valve or it does not work, call the City at the number above. 

Water Quality

The City regularly monitors the quality of its wells and all water purchased from the San Francisco Public Utilities Commission and Santa Clara Valley Water District to ensure that the drinking water it provides meets or exceeds all federal and state drinking water standards.

City crews perform regular maintenance of the water system to ensure that we can continue to deliver the highest quality water possible.

Water Fluoridation

The San Francisco Public Utilities Commission fluoridates the water it provides to the City of Sunnyvale in response to the California's Fluoridated Drinking Water Act, Assembly Bill 733, which became law in 1995 and required water systems with 10,000 or more service connections to fluoridate once funding was available.

  • Fluoride Map - only the region of Sunnyvale north of El Camino Real receives fluoridated water

Urban Water Management Plan and Water Shortage Contingency Plan

California law requires that the City review and update its Urban Water Management Plan (UWMP) every five years. A new provision in the law also requires us to update our Water Shortage Contingency Plan (WSCP).

City Water Sources

The City's water comes from these multiple resources:

Last Updated: May 16, 2022