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(a) It shall be unlawful for any person to discharge or cause to be discharged to the storm drainage system any polluting material or any other material which is not composed entirely of stormwater.

(b) Except insofar as such may be identified by the city as sources of polluting materials, this section shall not apply to the following categories of nonstormwater discharges:

(1) Water line and fire hydrant flushing;

(2) Landscape irrigation;

(3) Diverted stream flows;

(4) Rising groundwaters;

(5) Uncontaminated groundwater infiltration into the storm drainage system;

(6) Uncontaminated pumped groundwater;

(7) Discharges from potable water sources;

(8) Foundation drains;

(9) Air conditioning condensation;

(10) Irrigation water;

(11) Springs;

(12) Water from crawlspace pumps;

(13) Footing drains;

(14) Lawn watering;

(15) Flows from riparian habitats and wetlands;

(16) Individual residential car washing;

(17) Individual residential dechlorinated swimming pool and hot tub discharges;

(18) Individual residential street washing;

(19) Emergency firefighting activities;

(20) Discharges specifically authorized by a separate National Pollutant Discharge Elimination System (NPDES) permit; and

(21) Discharges specifically authorized by separate Colorado Discharge Permit System (CDPS) permit. (Code 1979, § 39-163; Ord. No. 2009-27, § 1, 7-13-2009; Ord. No. 98-96, § 6, 1-11-1999)