60 ILCS 1/205-5
When used in this Article, unless the context clearly requires otherwise:
"Waterworks system" means and includes a waterworks system in its entirety, or any integral part of a waterworks system, including mains, hydrants, meters, valves, standpipes, storage tanks, pumps, tanks, intakes, wells, impounding reservoirs, machinery, purification plants, softening apparatus, and all other elements useful in connection with a water supply or water distribution system.
"Sewerage system" means and includes any one or more of the following: sewerage treatment plant or plants, collecting, intercepting, and outlet sewers, lateral sewers and drains, including combined and separate storm water and sanitary drains, force mains, conduits, pumping stations, ejector stations, and all other appurtenances, extensions, and improvements necessary, useful, or convenient for the collection, treatment, and disposal in a sanitary manner of sewage and industrial wastes.
"Combined waterworks and sewerage system" means and includes a waterworks and sewerage system, as defined in this Section, that a township determines to operate in combination.
"System" means a waterworks system, a sewerage system, or any separate integral part of a waterworks system or a sewerage system, or a waterworks system and sewerage system in combination as authorized and provided in Section 205-10.
60 ILCS 1/205-5