“Water system” means the entire physical plant and facilities owned, operated or controlled by the water utility, both within and outside the city limits which shall include but not be limited to all lands, rights, easements, permits, impoundments, reservoirs, tunnels, pipelines, trestles, bridges, roads, buildings, structures, machines, equipment, records, pumps, valves, hydrants, meters, services and all related facilities and appurtenances. The use of this term may refer to the entire water system or an appropriate functional division or part thereof. (Ord. 780 § 1, 1975; Ord. 416 § 1.16, 1968)