CPS Energy CPS Energy is the nation’s largest municipally owned energy utility providing both natural gas and electric service. We serve more than 765,000 electric customers and 335,000 natural gas customers in and around San Antonio, the nation’s seventh largest city. CPS
  Rail Road Commission The RRC mission is to serve Texas by our stewardship of natural resources and the environment, our concern for personal and community safety, and our support of enhanced development and economic vitality for the benefit of Texans. They maintain a database of liquid and gas fuel lines for large consumers. ONLINE MAP