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WSIP Overview

Seismic reliability. Delivery reliability. Water quality reliability. Water supply reliability.


The Water System Improvement Program (WSIP) is a $4.8 billion dollar, multi-year capital program to upgrade the SFPUC's regional and local water systems. The program will deliver capital improvements that enhance the SFPUC's ability to provide reliable, affordable, high quality drinking water in an environmentally sustainable manner to 2.6 million people in the greater Bay Area. The program consists of 83 projects - 35 local projects located within San Francisco and 48 regional projects, spread over seven counties from the Sierra foothills to San Francisco.

As of June 30, 2016, the WSIP is approximately 91% complete with construction finished on 35 local projects and 37 regional projects along the landmark Hetch Hetchy Regional Water System to ensure reliable water delivery to customers. Construction is in progress on eight regional projects valued at $2.1 billion, while construction has been completed on 37 regional projects valued at $1.6 billion. Only one Regional project remains in pre-construction, the Alameda Creek Recapture Project (ACRP). The public draft Environmental Impact Report (EIR) for this water supply project is scheduled to be released in Fall 2016, which is the last major EIR planned for the WSIP. There are also four new projects not yet initiated: the WSIP Closeout Project for each of the San Joaquin, Sunol Valley, Bay Division and Peninsula Regions.

With the completion of several large WSIP Regional projects this past year, we are very pleased to report that we have now completed the construction of a new seismically-designed lifeline that carries water from the Sunol Valley in the East Bay to the mid-Peninsula. That lifeline involves six segments, and construction activities have now been substantially completed on all six of these segments.

Pipeline Bay Tunnel HTWTP

The program is funded by a bond measure that was approved by San Francisco voters in November 2002 and will be paid for by both retail customers in San Francisco and 26 wholesale customers that serve Alameda, San Mateo and Santa Clara counties.

2015-2016 WSIP Update

The WSIP is one of the largest water infrastructure programs in the nation and the largest infrastructure program ever undertaken by the City of San Francisco.

Reliability. Sustainability. Quality. The WSIP objectives include:

  • Improve the system to provide high-quality water that reliably meets all current and foreseeable local, State, and Federal requirements.
  • Reduce vulnerability of the water system to damage from earthquakes.
  • Increase system reliability to deliver water by providing the redundancy needed to accommodate outages.
  • Provide improvements related to water supply/drought protection.
  • Enhance sustainability through improvements that optimize protection of the natural and human environment.
The Hetch Hetchy Water System crosses 3 major earthquake faults.
Last updated: 2/12/2018 2:31:17 PM