Mutual water systems are non-profit corporations administered by a board of directors. Every lot or service owner is a stockholder, or commonly called a holder of a certificate, guaranteeing water service. Although mutual systems are privately owned, they qualify for State and Federal low-interest loans.

Heights Mutual
This company is located north-easterly of Santa Rosa, and consists of 109 services. There are three active wells serving four pressure zones. The two largest zones are served by two steel tanks. There are three booster pumps serving the remaining customers. These areas are served by two redwood tanks. The tank levels, pump station, and emergency alarms are transmitted by radio to the central computer in Forestville.

The Board of Directors approved a master improvement plan in February 2003. This plan includes replacement of water mains and storage tanks.

West Beach Mutual
This system is located on Highway 1 between the communities of Bodega Bay and Jenner. This system consists of 15 services and is served by two wells located on the east side of Highway 1. There is one gravity service zone served by two concrete storage tanks.