Subd. 1. Violations. A person commits a violation if the person introduces or causes to be introduced into the city’s MS4 any discharge that is not composed entirely of storm water.
Subd. 2. Exempt Discharge Activities. The following are considered exempt discharge activities from enforcement action for a violation of this section:
1. A discharge authorized by, and in full compliance with, a site specific NPDES permit such as a storm water management plan permit for construction activities;
2. A discharge or flow resulting from firefighting by the Fire Department;
3. Agricultural storm water runoff;
4. A discharge or flow from water line flushing or disinfection that contains no harmful quantity of total residual chlorine or any other chemical used in line disinfection;
5. A discharge or flow from lawn watering or landscape irrigation;
6. A discharge or flow from a diverted stream flow or natural spring;
7. A discharge or flow from uncontaminated pumped groundwater or rising groundwater;
8. Uncontaminated groundwater infiltration;
9. Uncontaminated discharge or flow from a foundation drain, sump pump, or footing drain;
10. A discharge or flow from a potable water source not containing any harmful substance or material from the cleaning or draining of a storage tank or other container;
11. A discharge or flow from air conditioning condensation that is unmixed with water from a cooling tower, emissions scrubber, emissions filter, or any other source of pollutant;
12. A discharge or flow from individual residential car washing;
13. A discharge or flow from a riparian habitat or wetland;
14. A discharge or flow from cold water (or hot water with prior permission of the Director) used in street washing or cosmetic cleaning that is not contaminated with any soap, detergent, degreaser, solvent, emulsifier, dispersant, or any other harmful cleaning substance; or
15. Drainage from a private residential swimming pool containing no harmful quantities of chlorine or other chemicals. Drainage from swimming pool filter backwash is prohibited.
Subd. 3. No Exemptions. No exemption shall be allowed under Subd. 2 above if:
1. The discharge or flow in question has been determined by the city to be a source of a pollutant or pollutants to the waters of the state or to the MS4;
2. Written notice of such determination has been provided to the discharger;
3. The discharge has continued after the expiration of the time given in the notice to cease the discharge; or
4. A person commits a violation if the person introduces or causes to be introduced into the MS4 any harmful quantity of any substance.
Subd. 4. Connection with Sanitary Sewer Prohibited. A person commits an offense if the person connects a line conveying sewage to the MS4, or allows such a connection to continue.
Subd. 5. Nuisances.
1. An actual or threatened discharge to the MS4 that violates or would violate this section is hereby declared to be a nuisance.
2. A line conveying sewage or designed to convey sewage that is connected to the MS4 is hereby declared to be a nuisance.