Marin Municipal Water District

On April 25, 1912, the Marin Municipal Water District (MMWD) received its charter as the first municipal water district in California. Before that, water in central and southern Marin was provided by a number of small, private companies, many of them subsidiaries
of real estate developers. To ensure a reliable water supply, the citizens of Marin came together to create a publicly owned and managed water system.

Over the years, our customer base has expanded through the acquisition of 26 small, private water companies. Today MMWD provides high-quality drinking water to 186,000 people in a 147-squaremile area of south and central Marin County. Our service area includes ten towns and cities as well as unincorporated areas in the county.

Our Mission: To manage our natural resources in a sustainable manner and to provide our customers with reliable, high-quality water at a reasonable price.

Contact Marin Municipal Water District

Contact Marin Municipal Water District

220 Nellen Avenue
Corte Madera, California  94925
Phone: 415-945-1455


Service Area

Services provided in:
  • Marin County, California

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Tomales Bay Watershed
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