Water Quality

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Redwood City Water Quality Information

Currently, all Redwood City’s drinking water is supplied by the Hetch Hetchy regional water system, operated by the San Francisco Public Utilities Commission (SFPUC). The Hetch Hetchy system provides high quality drinking water to over 2 million people in the Bay Area. The SFPUC maintains a watershed control program that effectively limits or eliminates potential contamination to the water supply. The Hetch Hetchy water supply meets all federal and State criteria for watershed protection, disinfection treatment, bacteriological quality and operational standards, allowing the SFPUC and Redwood City to provide its customers exceptionally high quality drinking water.

Redwood City routinely monitors the distribution system for bacteriological quality, chlorine residual, general physical parameters and disinfection by-products. The City conducts tri-annual monitoring as required for Lead & Copper, and routinely collects 23 samples per week for bacteriological analysis from 51 dedicated sampling stations throughout the water distribution system.

Redwood City's Annual Water Quality Reports

Current Report: 2019

Past Reports:

Water Quality FAQ

Expand/Contract Questions and Answers

  • Have your water tested for lead.

  • How can I have my home water quality tested?

  • How much Lead is produced and released to the environment?

  • How will I know if Lead is in my drinking water?

  • How will Lead be detected in and removed from my drinking water?

  • I'm experiencing brown or yellow tinted water coming out of my faucet, what should I do?

  • Learn more about your drinking water!

  • What are the health effects?

  • What happens to Lead when it is released to the environment?

  • What is Lead and how is it used?

  • What is Unidirectional Flushing?

  • Why does the City flush water out of hydrants?

  • Why is Lead being regulated?