If bills for water or nonmetered fire hydrant service are not paid by the fifteenth of the month subsequent to their rendition, water service to the premises shall be discontinued and shall not be resumed until such time as all past due bills have been paid and until there shall have been paid an additional service charge in an amount to be set by city ordinance from time to time, for restoration of water service. Bill remaining unpaid sixty (60) days after rendition shall constitute a lien upon the real estate to which the service has been rendered. The clerk is authorized and directed to file notice of such lien in the office of the county recorder of deeds, and to pursue such legal action as is necessary to collect the delinquent charges. (Amended during 1997 codification: prior code § 38-2-7)