Water supply

As our snowpack melts, EBMUD is managing its reservoirs and releasing water to provide flood control. 

EBMUD’s water supply begins at the Mokelumne River watershed in the Sierra Nevada and extends 90 miles to the East Bay. The Urban Water Management Plan helps EBMUD ensure a reliable water supply for the next generation, which includes making the best use of limited supplies through water conservation and recycling and developing long-term projects.

EBMUD water supply

EBMUD's water supply system consists of reservoirs, aqueducts, treatment plants, and distribution facilities from the Mokelumne River Basin in the Sierra Nevada, to the East San Francisco Bay Area

Current Water Supply Outlook

Daily Water Supply Report

Get technical water supply data for the previous seven days.


Water Supply Update
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Total system storage
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Total system storage average
Mokelumne watershed precipitation*
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Mokelumne precipitation average
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(*from {{waterSupply.data.waterYearStart}})

Reservoir Releases

Information about reservoir releases can be found on our water supply reports page.

Long Term Planning for Water Reliability

Urban Water Management Plan

EBMUD's Urban Water Management Plan is a long-range planning document updated every 5 years to support long-term resource planning and water supply sustainability. The plan provides an assessment of supply and demand, an overview of the conservation program, recycled water program, groundwater plan, and, importantly, includes the Water Shortage Contingency Plan.


Learn more about how water recycling supplements our existing water supply.


Learn more about how conservation supplements our existing water supply.

Freeport Regional Water Facility - Sacramento River Water Supply

This regional water supply facility provides water for East Bay customers in multi-dry years.

Climate Change

EBMUD has developed mitigation and adaptation strategies to deal with the changing climate and its effects on water resources.

Mokelumne/Amador/Calaveras Integrated Regional Water Management Plan

Learn more about the updated MAC IRWMP including how EBMUD worked alongside other organizations as a stakeholder to craft a document founded on regional cooperation and integrated approaches to water resources planning.

EBMUD and the Delta

Learn about EBMUD's commitment to protecting critical infrastructure and the health of the Delta ecosystem.

Water Supply Management Program 2040

The Water Supply Management Program 2040 was EBMUD's long-term water supply plan to evaluate sufficient water supplies for future generations.