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Mission and History

Sunset on a reservoir

Our roots run deep.

Chartered on April 25, 1912, the Marin Municipal Water District is the first municipal water district in California. Prior to that, water in central and southern Marin had been provided by several small, private companies, many of them subsidiaries to local real estate developers. Recognizing the critical importance of reliable water service, the community came together to create a publicly owned and managed water system. Our proud history is what drives our work, and it is at the heart of our mission.

Today, we serve more than 191,000 people in central and southern Marin. We are proud to provide 100 percent locally sourced drinking water. About 75 percent of our water supply comes from our reservoirs on Mt. Tamalpais and in west Marin, with the remaining supply coming from neighboring Sonoma County’s Russian River water system. Our local water supply means you can be sure your water is clean, fresh and sustainably sourced.


MMWD will manage our natural resources in a sustainable manner and provide our customers with reliable, high-quality water at a reasonable price.


MMWD will be a valued water service provider supporting the high quality of life in Marin County.


  • Environmental Stewardship & Sustainability
  • Integrity and Ethics
  • Open and Responsive Communications
  • Diversity
  • Healthy Work Environment
  • Cooperation
  • Continuous Improvement through Initiative, Leadership, Personal Development, Training
  • Culture of Excellence and Innovation
  • Responsible Financial Management

Additional Resources