It is determined and declared to be necessary and conducive to the protection of the public health, safety, welfare and convenience of the city to collect charges, rates or user fees from all persons owning, or to levy for same upon, all lots, parcels of real estate or buildings that are connected directly or indirectly with the public sewer system by or through any part of such sewage system of the city or that in any way use such public sewer system; the proceeds of such charge or fees so derived to be used for the purpose of operating, maintaining and repairing such public sewer system.  (Ord. S-39109, 1979).