The Tri-Valley had a water conservation rate of  -3% in the month of March 2022 compared to March 2020

Delivering the highest standard of water quality, reliability and safety.

As the Tri-Valley region’s water wholesaler, we work with our water retailers to ensure the people of eastern Alameda County are taken care of.


News & Updates

Tri-Valley Water Agencies Encourage Local Business Community to Reimagine Its Landscaping

A statewide ban on irrigating non-functional turf at non-residential properties is now in effect.

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Zone 7 rolls out ozonation water treatment process at Patterson Pass Water Treatment Plant

Ozone replaces chlorine as main disinfectant, enhancing quality of finished water

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Meeting Agendas


Special Board Meeting

June 29, 2022

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Legislative Committee Meeting

June 23, 2022

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Kids Zone

Educating Future Generations

Check out our educational resources curriculum for first through eighth grades and learn about new and ongoing initiatives to further improve water quality.

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One of the best ways to cut down on water costs and maintenance is to replace your grass or turf with water-wise and native plants!

Northern California Drought Update

The Tri-Valley has received just 40% of our average amount of rainfall this season.

Did you know most of the Tri-Valley’s water comes from outside our region?

On average, 70% of our water supply is imported surface water through the South Bay Aqueduct.