A. 
No person shall discharge or cause to be discharged into the municipal storm drain system or watercourses any materials, including but not limited to pollutants or waters containing any pollutants that cause or contribute to a violation of applicable water quality standards, other than stormwater.
B. 
The commencement, conduct or continuance of any illegal discharge to the storm drain system is prohibited, except as described as follows:
(1) 
Discharges from the following activities will not be considered a source of pollutants to the storm drain system and to waters of the United States when properly managed to ensure that no potential pollutants are present, and therefore they shall not be considered illegal discharges unless determined to cause a violation of the provisions of the Clean Water Act or this ordinance:
(a) 
Potable water line flushing;
(b) 
Uncontaminated pumped groundwater and other discharges from potable water sources;
(c) 
Landscape irrigation and lawn watering;
(d) 
Diverted stream flows;
(e) 
Rising groundwater;
(f) 
Groundwater infiltration to the storm drain system;
(g) 
Uncontaminated foundation and footing drains;
(h) 
Uncontaminated water from crawl space pumps;
(i) 
Air-conditioning condensation;
(j) 
Uncontaminated nonindustrial roof drains;
(k) 
Springs;
(l) 
Individual residential and occasional noncommercial car washing;
(m) 
Flows from riparian habitats and wetlands;
(n) 
Dechlorinated swimming pool discharges;
(o) 
Street wash waters;
(p) 
Flows from firefighting.
(2) 
The prohibition shall not apply to any nonstormwater discharge permitted under an NPDES permit, waiver, or waste discharge order issued to the discharger and administered by the State of Connecticut 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 by the Town of New Canaan for any discharge to the storm drain system.
(3) 
With written concurrence of the Connecticut Department of Environmental Protection, the Town of New Canaan may exempt in writing other nonstormwater discharges which are not a source of pollutants to the storm drain system nor waters of the United States.
A. 
The construction, use, maintenance or continued existence of illicit connections to the storm drain system is prohibited.
B. 
This prohibition expressly includes, without limitation, illicit connections made in the past, regardless of whether the connection was permissible under law or practices applicable or prevailing at the time of connection.
No person shall throw, deposit, leave, maintain, keep, or permit to be thrown, deposited, left, or maintained, in or upon any public or private property, driveway, parking area, street, alley, sidewalk, component of the storm drain system, or water of the United States, any refuse, rubbish, garbage, litter, or other discarded or abandoned objects, articles, and accumulations, so that the same may cause or contribute to pollution. Wastes deposited in streets in proper waste receptacles for the purposes of collection are exempted from this prohibition.
Any person subject to an industrial or construction activity NPDES stormwater discharge permit shall comply with all provisions of such permit. Proof of compliance with said permit may be required in a form acceptable to the Public Works Director prior to or as a condition of a subdivision map, site plan, building permit, or development or improvement plan; upon inspection of the facility; during any enforcement proceeding or action; or for any other reasonable cause.