Established in 1899, The United Illuminating Company is an independently owned and operated regional electricity distribution company. The company purchases electricity and transmits and sells it to more than 323,000 residential, commercial and industrial customers spread over 330 square miles of area in Connecticut. Its projects include the Trumbull and Broadway substations. The United Illuminating Company also operates a nearly 4-acre open-air transmission line switching station. The company has a work force of more than 1,000 employees. It offers online bill payment options and energy saving tips. In addition, the company provides water heaters on a lease basis. The United Illuminating Company is owned and operated by UIL Holdings Corporation.