For the purposes specified in Section 927.07, there is hereby levied and assessed a charge or rental upon each lot, parcel of land, building or premises served by, having connections with, or otherwise discharging sewage, wastes or water directly or indirectly into the sanitary and combined sewerage system of the City or having such connection available, based upon the quantity of water used upon the same, or sewage discharged therefrom directly or indirectly into such system and measured, computed and payable as hereinafter provided at the rates established by legislation of Council.