SJW Group, through its subsidiaries, provides water utility services in the United States. It engages in the production, purchase, storage, purification, distribution, wholesale, and retail sale of water and wastewater services. The company also provides non-tariffed services, including water system operations, maintenance agreements, and antenna site leases; contracted services and sewer operations to water utilities; and a Linebacker protection plan for public drinking water customers in Connecticut and Maine.