CPS Energy is the nation's largest municipally owned energy company providing both natural gas and electric service. Acquired by the City of San Antonio in 1942, the company serves 707,000 electric customers and 322,000 natural gas customers in and around America's seventh-largest city. CPS Energy owns the highest financial ratings of any electric system in the U. S., stands number 1 in wind-energy capacity among municipally owned utilities across the country and ranks number 1 in Texas in solar-generated electricity under contract.