EnergySouth, Inc. is the holding company for a family of energy businesses. Mobile Gas purchases, sells, and transports natural gas to residential, commercial, and industrial customers in Mobile, Alabama and surrounding areas. Mobile Gas also provides merchandise sales, service, and financing. EnergySouth Midstream is the general partner of Bay Gas Storage Company, a limited partnership that provides underground storage and delivery of natural gas. Effective June 12, 2007, EnergySouth Services is a subsidiary of EnergySouth Midstream. EnergySouth Services is the general partner of Southern Gas Transmission Company, which is engaged in the intrastate transportation of natural gas.