print Font Size: small font medium font large font

The Rinconada Water Treatment Plant

Process Diagram -
Click to enlarge

The Rinconada Water Treatment Plant is the second-largest of the Santa Clara Valley Water District's plants. Completed in 1967 by the Santa Clara County Flood Control and Water Conservation District - the precursor to today's water district - the plant can treat and deliver up to 80 million gallons of water each day for retailers who supply residential and commercial users in the West Valley, including the cities of Santa Clara, Campbell, Sunnyvale, Cupertino, Mountain View, Monte Sereno, Saratoga and Los Altos and the towns of Los Gatos and Los Altos Hills. 

Water source
Rinconada draws water from the South Bay Aqueduct (SBA) and the San Luis Reservoir. The San Luis Reservoir is a key component of the federal Central Valley Project while the SBA is a key component of the State Water Project system. Water from the Sacramento-San Joaquin Delta pumps into the Delta-Mendota Canal and then into the San Luis Reservoir. The water district is one of many users that draw water from this reservoir. The water district's local Anderson and Calero reservoirs can also supply the plant. 

What's happening at your plant 

Making the plant
better -
Click to enlarge


  • The water district is preparing for a $135 million modernization of the plant in 2015 - the Reliability Improvement Project - that will overhaul the treatment process at the nearly 50-year-old facility. In the meantime, work is taking place there to improve the way the plant handles sludge produced during the treatment process. Known as the Treated Water Valves Upgrade/Residuals Management Project, the district began the construction in November and expects it to continue through 2015.

  • On Nov. 13, the water district held a community meeting at the plant to provide more details about the Reliability Improvement Project and address any potential concerns associated with traffic, noise and safety. The district project team is looking into questions residents expressed regarding the plant work and a construction project by the city of Saratoga to replace two 100-year-old and unsafe bridges at Quito Road. Both projects will coincide and residents are concerned about potential traffic hassles along the nearby More Avenue. The project is planning to work with the city's Public Works Department to address those worries.
  • The project team recently launched a blog dedicated to the Reliability Improvement Project. For the most up-to-date information on the project, including construction schedule, background information and meeting recaps, check out 

Contact information
If you have any questions or concerns about the Rinconada Water Treatment Plant, please contact Neighborhood Liaison Tony Mercado at (408) 630-2342 or by e-mail at

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

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.