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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 3-6
All phases targeted for completion by April 2029
News and UpdatesNews and Updates
Reports and DocumentsReports and Documents
Environmental and Community BenefitsEnvironmental and Community Benefits
History and BackgroundHistory and Background
News & Updates

Public meeting held Feb. 29, 2024

Thirty-five neighbors of the Rinconada Water Treatment Plant attended Valley Water’s Feb. 29 public meeting to hear about upcoming construction plans and learn about plant operations during a brief facility tour. A video of the meeting will be available soon on Valley Water's YouTube channel. 

Deputy Operating Officer Sam Bogale speaks to Rinconada neighbors about the clarifiers and how their upcoming demolition will benefit the treatment plant.


Public meeting videos available on YouTube

Valley Water keeps a video library of its past community meetings on its YouTube channel at        

Aug. 18, 2021, Valley Water hosted a virtual public meeting that focused on these two new projects. If you missed the meeting, you can view it at the following link on Valley Water's YouTube channel:

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
Neighborhood Liaison Tony Mercado during regular business hours at (408) 630-2342 or by email at [email protected]

If an urgent problem arises after regular business hours, please call the on-duty plant supervisor at (408) 265-2607, ext. 2121.

Valley Water 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

The Reliability Improvement Project 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 Valley Water’s oldest treatment plant, having provided continuous and reliable service since 1967. While Rinconada primarily serves the west side of Santa Clara County, residents across the county contribute to the project funding through water rates.