City of San Mateo Law Library
City of San Mateo Municipal Code.

7.39.090 DISCHARGE OF POLLUTANTS.

(a) The discharge of non-stormwater discharges to the City storm drain system is prohibited. All discharges of material other than stormwater must be in compliance with a NPDES permit issued for the discharge (other than NPDES Permit No. CA0029921).

(b) The following discharges are exempt from the prohibition set forth in this section:

(1) The prohibition on discharges shall not apply to any discharge regulated under a National Pollutant Discharge Elimination System (NPDES) permit issued to the discharger and administered by the State of California under authority of the United States Environmental Protection Agency, provided that the discharger is in full compliance with all requirements of the permit and other applicable laws or regulations.

(2) Discharges from the following activities will not be considered a source of pollutants to waters of the United States when properly managed: water line flushing and other discharges from potable water sources, landscape irrigation and lawn watering, irrigation water, diverted stream flows, rising ground waters, infiltration to separate storm drains, uncontaminated pumped groundwater, foundation and footing drains, water from crawl space pumps, air conditioning condensation, springs, individual residential car washings, flows from riparian habitats and wetlands, de-chlorinated swimming pool discharges or flows from fire fighting, and accordingly are not subject to the prohibition on discharges.