A. The discharge of any waters containing toxic or poisonous solids, liquids, or gases in sufficient quantity, either singly, or by interaction with other wastes, to contaminate the sludge of any municipal systems, or to injure or interfere with any sewage treatment process, constitute a hazard to humans or animals, create a public nuisance, or create any hazard in or have an adverse effect on the waters receiving any discharge from the treatment works is prohibited.

B. Each user which discharges any toxic pollutants, grease, fats, oils and heavy metals which cause an increase in the cost of managing the effluent, influent, raw sewerage or the sludge of the treatment works shall pay for such increased costs.

C. No persons shall make connection of roof down-spouts, exterior foundation drains, areaway drains, or other sources or surface runoff or groundwater to a building sewer or building drain which in turn is connected directly or indirectly to a public sanitary sewer.

D. Article V of the city’s "regulation of sewer use," Chapter 13.08 of this code, contains additional requirements covering the use of the city’s public sewers. (Ord. 414 § 11, 1982)