65 ILCS 5/11-117-2

The term "public utility," when used in this Division 117, means and includes any plant, equipment, or property, and any franchise, license, or permit, used or to be used (1) for or in connection with the transportation of persons or property, or the conveyance of telegraph or telephone messages; or (2) for the production, storage, transmission, sale, delivery, or furnishing of cold, heat, light, power, water, or for the conveyance of oil or gas by pipe lines; or (3) for the storage or warehousing of goods; or (4) for the conduct of the business of a wharfinger.