The installation or maintenance of a cross connection which in the opinion of the superintendent will endanger the water quality of the potable water supply of the city is unlawful. Failure on the part of any service customer to discontinue the use of a cross connection which in the opinion of the superintendent will endanger the water quality of the potable water supply of the city shall be sufficient cause for the discontinuance of the water service to the premises on which the cross-connection exists. Water service shall not be resumed until, in the opinion of the superintendent, the water quality of the potable water supply of the city is no longer endangered. (Ord. 2961 § 1, 2015; Ord. 1988 § 2, 1985)