Open seven days a week.
Winter Hours hours are: 7 a.m. to 5 p.m.
Los Vaqueros Expansion Project Updates, Web Cam
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Plans for Reopening Los Vaqueros, Tarantula Run, & Other Los Vaqueros Events
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Los Vaqueros is about Water Quality
Los Vaqueros was designed first as a water quality reservoir. The Contra Costa Water District pumps all of its water from the Sacramento/San Joaquin Delta.
During the late winter and spring months, when the Sierra Nevada snow pack melts and flows into the Delta, the quality of the water in the Delta is very high.
But in the late summer and early fall, high levels of salt often creep into the Delta from the San Francisco Bay and cannot be treated.
With Los Vaqueros, the District pumps high quality water into the reservoir and saves it. When water in the Delta gets salty, the District blends water from the Delta with the quality water from Los Vaqueros, lowering the salt content dramatically.
The entire project cost $450 million.
Click on the topics to the left for more information.
