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.
How We Serve You
Our water meets not only state and federal health standards, it outperforms many of them – which inspired us to create the more stringent Zone 7 standards.
We are continually working to secure our water supply – even in our ever-changing environment of water rights and availability.
We are continuously improving our level of preparedness and resiliency in managing our watershed to protect the Tri Valley community from flooding.
Zone 7 uses the UWMP to help evaluate and plan for the Tri-Valley's water supply needs.
Visit our Water Conservation section to get tips from our youngest water saving guru for both inside your home and outside in your yard.
Learn more about the journey our water takes from the Sierra Nevadas as snowmelt through hundreds of miles of infrastructure to make it to your tap.
Dive into the Wondrous World of Water to learn how in the world ozone disinfects water! Our water quality video series takes a look at how Zone 7 provides clean, safe drinking water for the Tri Valley community.
Our board meets the third Wednesday of every month. Visit our Calendar of Events to get the latest link to attend virtually.
Flood preparedness guru Flood Ready Freddy provides you with all the info you need to get flood ready all year round.
News & Updates
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!
The Tri-Valley has received just 40% of our average amount of rainfall this season.
On average, 70% of our water supply is imported surface water through the South Bay Aqueduct.