Unpolluted water, including, but not limited to, cooling water, process water or blow-down from cooling towers or evaporative coolers, or surface drainage from streets, curb and gutter or parking lots, shall not be discharged through direct or indirect connection to a public sanitary sewer. All installations of air-conditioning systems require the issuance of a permit therefore by the city and the payment of customary building and/or plumbing permit fees to the city prior to commencement of installation. All evaporative coolers shall be furnished with a circulating pump or be drained to yard areas, seepage wells or leaching devices, or storm drains. All new installations of industrial, commercial or residential air conditioning units shall have cooling water discharge recirculated or shall be of such type as not to require cooling water discharge. In no case shall discharge be permitted to be connected to the sanitary sewer system; except, that condensation only from cooling towers may be discharged to the sanitary sewer system by permit only. In no case shall water from evaporative coolers or air conditioning units be allowed to discharge onto public streets, alleys or sidewalks or to in any manner create a public nuisance. (Ord. 2006-02 (part), 2006: Prior code § 4247)