Southern California Gas Co. (SoCalGas) has been delivering clean, safe and reliable natural gas to its customers for more than 140 years. It is the nation's largest natural gas distribution utility, providing service to 20.9 million consumers connected through nearly 5.8 million meters in more than 500 communities. The company's service territory encompasses approximately 20,000 square miles throughout central and Southern California, from Visalia to the Mexican border. Both SDG&E and SoCalGas are subsidiaries of Sempra Energy (NYSE: SRE ), a Fortune 500 energy services holding company based in San Diego.