The director of public works and utilities and chief operator shall be responsible for the protection of the public potable water supply from contamination or pollution due to the backflow or back-siphonage of contaminants or pollutants through the water service connection. (Ord. 2713 NCS §2 (Exh. A (part)), 2020; Ord. 1677 NCS §2 (part), 1987.)