PG&E Corp. is the parent holding company of California's largest regulated electric and gas utility, Pacific Gas and Electric Company. The utility generates revenues mainly through the sale and delivery of electricity and natural gas to customers. It engages in the business of electricity and natural gas distribution; electricity generation, procurement, & transmission; and natural gas procurement, transportation and storage. The utility also operates hydro-electric, nuclear and fossil fuel power plants. The utility is interconnected with electric power systems in the Western Electricity Coordinating Council, which includes several western states, Alberta and British Columbia, Canada and parts of Mexico. It procures natural gas directly from producers and marketers, both in Canada and the United States.