East Bay Municipal Utility District (EBMUD) has a proud history of providing high-quality drinking water for 1.4 million customers in Alameda and Contra Costa counties. The District’s award-winning wastewater treatment protects San Francisco Bay and serves 685,000 customers.

EBMUD has a seven-member Board of Directors publicly elected from wards within the EBMUD service area. The Board is committed to developing policy through an open, public process, guided by the EBMUD Mission Statement.

Under the direction of the Board and General Manager, EBMUD staff works 24/7. From Pardee Reservoir and through a web of pipes and facilities, EBMUD supplies mountain water to East Bay customers. Every day of the year, EBMUD treats wastewater before it is discharged to the bay. The District recycles water, produces energy from waste and works with residents and businesses to keep pollutants from reaching the bay.

East Bay Municipal Utility District (EBMUD), colloquially referred to as "East Bay Mud", is a public utility district which provides water and sewage treatment services for an area of approximately 331 square miles (860 km2) in the eastern side of the San Francisco Bay. As of 2018, EBMUD provides drinking water for approximately 1.4 million people in portions of Alameda County and Contra Costa County in California, including the cities of Richmond, El Cerrito, Hercules, San Pablo, Pinole, Lafayette, Moraga, Orinda, Danville, Oakland, Piedmont, Emeryville, Berkeley, Albany, Alameda, San Leandro, neighboring unincorporated regions, and portions of cities such as Hayward and San Ramon. Sewage treatment services are provided for 685,000 people in an 88-square-mile area (as of 2018). EBMUD currently has an average annual growth rate of 0.8% and is projected to serve 1.6 million people by 2030. Headquartered in Oakland, EBMUD owns and maintains 2 water storage reservoirs on the Mokelumne River, 5 terminal reservoirs, 91 miles of water transmission aqueducts, 4,100 miles of water mains, 6 water treatment plants (WTPs), 29 miles of wastewater interceptor sewer lines and a regional wastewater treatment facility (WWTF) rated at a maximum treatment capacity of 320 MGD.

In 1923, EBMUD was founded due to the rapid population growth and severe drought in the area. The district constructed Pardee Dam (finished in 1929) on the Mokelumne River in the Sierra Nevada, and a large steel pipe Mokelumne Aqueduct to transport the water from Pardee Reservoir across the Central Valley to the San Pablo Reservoir located in the hills of the East Bay region. In subsequent years, EBMUD constructed two additional aqueducts to distribute water to several other East Bay reservoirs. From the various large regional reservoirs, water is transported to treatment plants and delivered to local reservoirs and tanks, thence distributed by gravity to customers.