Menu About MCWD Mission The Mammoth Community Water District is committed to carefully and effectively managing and maintaining our local water resources. The District provides water and wastewater services to meet the health and safety needs of the community. All work is conducted in a safe, financially sound, and high quality manner. We are committed to our customers and the environment in which we live. 2020/2021 MCWD Annual Report Fiscal Year 2022 Strategic Plan Board Members Mammoth Community Water District is a California Special District governed by a five-member Board of Directors. The Directors are elected by the registered voters of Mammoth Lakes to four-year staggered terms, with elections held in even numbered years. For more information on election procedures and deadlines, please visit the Mono County Elections page. All Directors are appointed to Board committees and are liaisons to other governmental and community boards as well as regional and national associations and organizations. Staff By Department The MCWD Staff provides water, wastewater and recycled water services to a resident population of 8,200 and up to as many as 35,000 people during holiday periods. There are seven departments with forty three full-time employees. An additional eight to fifteen staff members are hired on seasonally to help with various construction and maintenance projects. Click here for our Department List MCWD Facts District Area Acreage: 3,722 acres / 5.8 square miles Primary Land Use: Residential, commercial Population: 8,200 permanent residents / 33,500 persons on peak winter weekends Governance Date of Formation: August 5, 1957 Governing Body: A 5-member Board of Directors elected by the registered voters of Mammoth Lakes Staff: 43 full-time employees, plus seasonal employees as needed; overseen by a General Manager Facilities and Operation Wastewater Treatment Plant (original): Constructed 1965 (upgraded in 1980, 1982, 1992, 2004, 2007) Administration Building: Constructed 1971 Vehicle Maintenance Building: Constructed 1975 Groundwater Treatment Plant 1: Constructed 1988 Lake Mary Plant: Constructed 1978; (Capacity 3.1 million gallons per day) Groundwater Treatment Plant 2: Constructed 1994 Engineering/Operations Building: Constructed 1998 Vehicle Storage Building: Constructed 2000 Recycled Water Facility: Constructed 2009 Photovoltaic Power Plant: Constructed 2010-2011 (see separate handout for more details) Equipment Storage Building: Constructed 2016 Water Lines: 80 miles Sewer Lines: 75 miles Surface Water Source: Lake Mary Groundwater Sources: 9 Production wells / 30 Monitoring wells (throughout the Mammoth Lakes Basin) Fun Facts Average Drinking Water Demand: 1.33 Million Gallons/Day (MGD) from October – April Average Demand During Irrigation Season: 3-5 Million Gallons/Day (MGD) from May – September Wastewater Flow (average): 1.14 MGD Biggest Wastewater Flows: Occur during President’s Week in February Changed name from Mammoth County Water District to Mammoth Community Water District: 1994 Address 1315 Meridian Blvd PO Box 597 Mammoth Lakes, CA 93546 Click Here for Directions Contacts Main Line: (760) 934-2596 Monday – Friday 7:30am to 4:30pm After Hours Emergency: (760) 914-0935 Anonymous Reporting Hotline: (760) 924-4511 © 2021 Mammoth Community Water District To the top ↑