Public utilities provide electric, gas, water or telephone service to customers in a specified area. Utilities have a duty to provide safe and adequate service on reasonable terms to anyone who lives within the service area on without discriminating between customers. Because most utilities operate in near monopolistic conditions, they can be heavily regulated by local, state, and federal authorities. Generally, the local and state agencies are called Public Service Commissions (PSC) or Public Utility Commissions (PUC). Municipal Utilities and Rural Electric Cooperatives may be unregulated though.
Dunnigan (formerly, Antelope) is an unincorporated community in Yolo County, California on Interstate 5. The population was 717 at the 2006 census. Dunnigan's ZIP code is 95937 and its area code 530. It lies at an elevation of 69 feet (21 m).