Utilities News

SFPUC Water Supply Blend Change

SFPUC Water Supply Blend Change

The San Francisco Public Utilities Commission (SFPUC) is completing infrastructure improvement work on the Mountain Tunnel pipeline facility that delivers water to its wholesale customers from the Hetch Hetchy Reservoir. In order to accommodate this work over the past few months, SFPUC had shut down the water supply from Hetch Hetchy and delivered water from local surface reservoirs to wholesale customers, including Palo Alto. SFPUC plans to bring the Hetch Hetchy water supply back online this weekend (March 11-12).


Potential Change in Taste, Color or Odor
As with any water source blend change, there is a possibility that turbidity could stir up material in the pipes. While SFPUC does not anticipate any changes in water quality or aesthetics of taste, color or odor to our water, there is always the possibility that customers may notice a slight change in the water coming from their taps.

SFPUC and City staff test the water every day to ensure it meets safe standards for drinking water, and we will continue to work with SFPUC to deliver timely information about any changes in water quality aesthetics. Please contact our Water Transmission staff at (650) 496-6967 if you have any questions or concerns. You can also email us at

Highly Sensitive Customers
Since occasional minor fluctuations in water quality can occur, we encourage people who may be vulnerable to drinking water contaminants to seek advice from their health care provider, who may recommend taking precautionary measures such as adding filtration devices.

Palo Alto Water Quality
CPAU and SFPUC are required by law to adhere to strict health and safety standards for potable drinking water. Every year we publish a Consumer Confidence (water quality) Report, which informs customers about the City's water quality. General questions or concerns? Call us at (650) 329-2161 to report issues or request information.

Annual Consumer Confidence Report
Your water has a variety of physical, chemical and biological elements that are described in more detail in our Consumer Confidence (water quality) Report. This report is updated every year and made available to our utility customers.

Visit our water resources page at www.cityofpaloalto.org/waterquality for more information on Palo Alto's water quality.

Last Updated: March 9, 2017