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Rinconada Water Treatment Plant Reliability Improvement

About This Project

The Reliability Improvement Project is aimed at retrofitting, upgrading and/or replacing key equipment that is reaching the end of its natural life, addressing the areas of raw water ozone, flocculation and sedimentation. Filtration and redundant disinfection.

The work will also increase the plant’s treatment capacity from 80 million gallons of water a day to 100 million gallons a day and help the district meet increasingly stringent standards for water quality, seismic stability and safety.

Future site rendering
Los Gatos
Phase 2
All 5 Phases targeted for completion by 2021
Approximately $300 million
News and UpdatesNews and Updates
Reports and DocumentsReports and Documents
Environmental and Community BenefitsEnvironmental and Community Benefits
History and BackgroundHistory and Background
News & Updates

Current status

The project is in the middle of Phase 2, which involves the construction of several facilities, including the raw water ozone contactor, flash mix facility, flocculation and sedimentation basins, wash water recovery facility and temporary water piping.


Upcoming work

The week of July 16 will signal increased activity around the Granada Gate, which serves as the main construction vehicle entryway to the Rinconada Water Treatment Plant.  

On Monday, July 16, the district will begin installing within the plant a 48-inch diameter pipeline near the gate entrance. This pipeline is meant to transfer emergency overflows from washwater recovery facilities — buildings that recycle unused water during the treatment process — to lower sludge drying basins, which remove water from sludge produced during the process for easy disposal. The work will run through this September and will mean increased truck traffic, noise and dust in that area.

That same day, the district will begin dismantling the large crane within the treatment plant, signaling an end to the heavy duty part of construction. On Tuesday, July 17, the district will cart the disassembled crane on smaller flatbed trucks through the Granada Gate. 

For each task, the district will take great means to lessen the impact to the neighborhood, including routine dust control via water trucks.  

For any questions, please contact the water treatment plant's neighborhood liaison, Tony Mercado, at 408-630-2342 or via email at [email protected] 


Contact information
If you have any questions or concerns about the Reliability Improvement Project, please contact Neighborhood Liaison Tony Mercado at (408) 630-2342, or by email at [email protected]

The Santa Clara Valley Water District is committed to providing a healthy, clean, reliable and affordable water supply that meets or exceeds all applicable water quality regulatory standards in a cost-effective manner

Environmental & Community Benefits

Known as the Reliability Improvement Project, this endeavor will replace or upgrade all major plant components and increase Rinconada’s treatment capacity to 100 million gallons of water a day. These enhancements will also result in improved taste for your drinking water. The Project includes the design and construction of new facilities, including raw water ozonation, flocculation and plate settler clarification and dual media filtration. This work will also help the district meet increasingly stringent standards for water quality, seismic stability and safety.

This completed project will use the following steps in drinking water treatment:

  • Raw Water Ozone
  • Flocculation and Sedimentation
  • Filtration
  • Redundant disinfection
History & Background

The Rinconada Water Treatment Plant is the Santa Clara Valley Water District’s oldest treatment plant, having provided continuous and reliable service since 1967. The facility is a source of pride in the organization and this retrofit is the largest capital improvement project ever constructed by the District. Including the planning, design and construction, the project will cost approximately $300 million.

This work is about one thing: Ensuring the plant continues to consistently and uninterruptedly fulfill its role as the major provider of drinking water to more than one million people on Santa Clara County’s west side.