When used in this Division the term “waterworks system” means and includes a waterworks system in its entirety, or any integral part thereof, 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.
     The term “sewerage system” means and includes any or all of the following: Sewerage treatment plant or plants, collecting, intercepting, and outlet sewers, lateral sewers and drains, including combined 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 storm water, sanitary sewage and industrial wastes.
     The term “combined waterworks and sewerage system” means and includes a waterworks and sewerage system, as hereinabove defined, which any county shall determine to operate in combination.
     The term “waste management” means the process of storage, treatment or disposal, but not the hauling or transport, of “waste” as defined in Section 3.535 of the Environmental Protection Act, but excluding “hazardous waste” as defined in that Act.