Pacific Gas and Electric Company generates, transmits, distributes, and sells electricity and natural gas to customers in northern and central California, the United States. It generates electricity using nuclear, hydroelectric, fossil fuel-fired, and photovoltaic sources. As of December 31, 2021, the company owned and operated approximately 18,000 circuit miles of interconnected transmission lines, 33 electric transmission substations, approximately 108,000 circuit miles of distribution lines, 67 transmission switching substations, and 753 distribution substations; and natural gas transmission, storage, and distribution system consisting of approximately 43,800 miles of distribution pipelines, approximately 6,200 miles of backbone and local transmission pipelines, and various storage facilities. It serves residential, commercial, industrial, and agricultural customers, as well as natural gas-fired electric generation facilities. The company was incorporated in 1905 and is headquartered in San Francisco, California. Pacific Gas and Electric Company is a subsidiary of PG&E Corporation.