"Public water supply system" shall mean the utility serving five (5) or more connections through an integrated piping system; five (5) or more residences or dwelling units; a school; employee housing facility; a commercial or industrial establishment; or any system serving more than five (5) equivalent service connections. (§ 4, Ord. 811, eff. July 27, 1978, as amended by § 1, Ord. 1099, eff. October 19, 1989; as amended by § 3, Ord. 1470, eff. July 14, 2016)