(A) No person shall discharge or cause to be discharged into the municipal storm drain system or watercourses, any materials other than stormwater, including but not limited to pollutants or waters containing any pollutants that cause or contribute to a violation of applicable water quality standard.
(B) The commencement, conduct, or continuance of any illegal discharge to the storm drain system is prohibited, except as follows:
(1) The following discharges are exempt from discharge prohibitions established by this chapter: water line flushing or other potable water sources, landscape irrigation or lawn watering, diverted streamflows, rising groundwater, groundwater infiltration to storm drains, uncontaminated pumped groundwater, foundation or footing drains (not including active groundwater dewatering systems), crawl space pumps, air conditioning condensation, springs, non-commercial washing of vehicles, natural riparian habitat or wetland flows, swimming pools (if dechlorinated -typically less than one part per million of chlorine), firefighting activities, and any other water source not containing pollutants;
(2) Discharges specified in writing by the City Manager as being necessary to protect public health and safety;
(3) Dye testing is an allowable discharge, but requires a verbal notification to the City Manager prior to the time of test; or
(4) The prohibition shall not apply to any non-stormwater discharge permitted under an NPDES permit, waiver, or waste discharge order issued to the discharger and administered under the authority of the Federal Environmental Protection Agency, provided that the discharger is in full compliance with all requirements of the permit, waiver, or order and other applicable laws and regulations, and provided that written approval has been granted for any discharge to the storm drain system.