Cater Reservoir Resiliency Project

The Cater Water Treatment Plant Reservoir Resiliency Project will construct a new 2.5-million-gallon (MG) reservoir and complete seismic, mechanical, and electrical upgrades at William B. Cater Water Treatment Plant (Cater WTP). The new 2.5 MG chlorine contract basin will extend the time available for chlorine contact in the treated water and allow bypass of the existing Clear Well (constructed in 1962) for extended periods of time. The operational flexibility provides the time needed for seismic and mechanical upgrades to be performed on the existing Clear Well, along with future maintenance on both reservoirs. Construction will begin June 2026 and is anticipated to be completed December 2028. 

The Project will enhance drinking water treatment reliability and operational flexibility, increasing the overall resiliency of the City’s water treatment system. 

Upcoming Meetings: 

June 17, 2026 – Community Information Meeting
Date: Wednesday, June 17, 2026
Time: 4:30 p.m. – 6:00 p.m.
Location: William B. Cater Water Treatment Plant
               1150 San Roque Road
*The City of Santa Barbara’s Cater Reservoir Resiliency Project team will host an informational meet and greet (open-house format) on Wednesday, June 17, 2026, to discuss the upcoming Cater Reservoir Resiliency Project with the community. Stop by to meet the project team and other neighbors, ask questions, and learn more about this important water supply project.

Previous Meetings: 

May 19, 2026 – City Council – Construction Contract Award

April 16, 2026 – Water Commission

June 10, 2024 – Architectural Board of Review

August 7, 2024 – Staff Hearing Officer

September 16, 2024 – Architectural Board of Review

March 13, 2024 – Historic Landmarks Commission

May 20, 2021 – Water Commission