Where Your Drinking Water Comes From & How it Gets to You

80% of our water is from the California State Water Project. Snowmelt from the Sierra Nevada mountains flows downstream into the California Delta, and then makes its way to the Tri-Valley area through the South Bay Aqueduct. The remaining 20% of the Tri-Valley's water supply is from Del Valle Reservoir and our local groundwater basin.

Zone 7 Water Agency maintains two water treatment plants and one groundwater demineralization plant to treat water. Livermore Municipal Water purchases treated water from Zone 7 Water Agency to provide to its customers.

Livermore Municipal Water manages what is known as a "drinking water distribution system". This system is the network of pipes and other infrastructure that allows water to flow from Zone 7 Water Agency's water treatment plants to your home or business.

After Zone 7 Water Agency treats your drinking water, it first flows to one of Livermore Municipal Water's five pump stations. These stations pump the water to four above-ground water storage tanks. These storage tanks hold millions of gallons of water for homes, irrigation, and fire protection.

Water then flows from the above-ground tanks to individual properties through a system of 162 miles of pipes, supplying water to 10,800 properties and 1,500 fire hydrants.

Urban Water Management Plans

All California water suppliers with more than 3,000 customers are required to prepare an Urban Water Management Plan every five years. Urban Water Management Plans help with long-term water resource planning to ensure that there will be adequate water supplies to meet future demand. The reliability and efficient use of water supplies are assessed over a 20-year time frame during normal, dry, and multiple dry year conditions. The Urban Water Management Plans below are specifically for Livermore Municipal Water.

Water Shortage Contingency Plans

Water Shortage Contingency Plans identify the actions that a water service provider will take if there are short or long-term water supply challenges. The plan identifies six conservation levels, each with their own voluntary or mandatory conservation measures to preserve the water supply.