A. It shall be unlawful for any person having control in any degree over any premises, or for any user of potable water supplied by the city, to permit the existence or occurrence of: 1) back pressure or back siphonage causing contamination; 2) backflow; or 3) contamination of the city potable water by an auxiliary water supply. It shall be unlawful for any person having control in any degree over any premises, or for any user of potable water supplied by the city, to allow cross connection of the city potable water system with any auxiliary water supply or other plumbing system which contains fluids not originating within the city potable water system, unless such cross connection is made with an approved backflow prevention assembly in compliance with this chapter.
B. Each city water system customer shall be responsible for the protection of the public potable water distribution system from contamination or pollution due to the backflow of contamination or pollutants through its water service connection. If, in the judgment of the city council an approved backflow prevention assembly is required (at the customer's water service connection or within the customer's private water system) for the safety of the water system, the water superintendent shall give notice in writing to said customer to install such an approved backflow prevention assembly at a specific location on his premises. The customer shall immediately install such approved assembly at the customer's own expense, and failure, refusal or inability on the part of the customer to install, have tested and maintain said assembly shall constitute grounds for discontinuing water service to the premises until such requirements have been satisfactorily met. (Ord. 90-17, 12-13-1990)