UIL Holdings Corp was incorporated in Connecticut. The Company's primary business is ownership of its operating regulated utility business. The utility businesses consist of the electric distribution and transmission operations of The United Illuminating Company (UI) and the natural gas transportation, distribution and sales operations of The Southern Connecticut Gas Company. The Company operates through two reporting segments namely Electric Distribution, Electric Transmission and Gas Distribution. The utility businesses is engaged in the purchase, transmission, distribution and sale of electricity for residential, commercial and industrial purposes in a service area of about 335 square miles in the southwestern part of the State of Connecticut. The gas companies engage in natural gas transportation, distribution and sales operations in Connecticut and western Massachusetts serving approximately 395,000 customers in service areas totaling approximately 1,966 square miles. The gas companies have valid franchises to engage in the transportation and distribution and sale of natural gas in their respective service areas. The franchise agreements allow the gas companies to construct and maintain certain facilities over, on and under public highways and grounds, and to exercise the power of eminent domain. UIL is subject to regulation by several regulatory bodies, including PURA, the Connecticut Siting Council (CSC) and the FERC. The gas companies are subject to regulation by several regulatory bodies, including PURA, which regulates SCG and CNG, and the DPU, which regulates Berkshire.