It shall be unlawful for any person, arm, partnership, corporation, individual or trust or municipality, to erect, construct, build, maintain or operate a sewage treatment plant or sewage disposal system, or a sewage treatment lagoon within the corporate limits of the city, where the discharge of any sewage or sewage effluent from any sewage disposal system, sewage treatment plant or sewage treatment lagoon may or could enter into any stream of water from which the city obtains water for the public water system of the city.
(`90 Code, § 18-22)