In June 1988, Somerset Mutual Water Company and Bellflower Mutual Water Company merged. The name of the new company became Bellflower-Somerset Mutual Water Company. In August 1997, BSMWC acquired Bigby Townsite Mutual Water Company, with approximately 109 services. In November 2005, approximately 782 new services in the City of Bellflower were purchased from the City of Norwalk and County Water Company. BSMWC started managing Bellflower Municipal Water System, owned by the City of Bellflower, in January 2007.
Today, Bellflower-Somerset Mutual Water Company has issued 20,553 shares of stock to 5,770 shareholders, qualifying them for water service. All stock is still connected to the land and cannot be transferred to anyone outside the service area. The company operates under a permit issued by the California Department of Public Health and complies with all California Domestic Water Quality and Monitoring Regulations of the California Health and Safety Code.