A. 
Illicit discharges. No person shall dump, discharge, cause or allow to be discharged any pollutant or nonstormwater discharge into the municipal storm drainage system, into a watercourse, or into the waters of the Commonwealth of Massachusetts.
B. 
Illicit connections. No person shall construct, use, allow, maintain or continue any illicit connection to the municipal storm drainage system, regardless of whether the connection was permissible under applicable law, regulation or custom at the time of connection.
C. 
Obstruction of municipal storm drainage system. No person shall obstruct or interfere with the normal flow of stormwater into or out of the municipal storm drainage system without prior written approval from the Authorized Enforcement Agency.
The following exemptions are applicable to § 154-9 of this chapter.
A. 
Discharge or flow resulting from firefighting activities.
B. 
The following nonstormwater discharges or flows are exempt from the prohibition of nonstormwaters, provided that the source is not a significant contributor of a pollutant to the municipal storm drainage system:
(1) 
Waterline flushing;
(2) 
Flow from potable water sources;
(3) 
Springs;
(4) 
Natural flow from riparian habitats and wetlands;
(5) 
Diverted stream flow;
(6) 
Rising groundwater;
(7) 
Uncontaminated groundwater infiltration, as defined in 40 CFR 35.2005(20), or uncontaminated pumped groundwater;
(8) 
Water from exterior foundation drains, footing drains (not including active groundwater dewatering systems), crawl space pumps, or air-conditioning condensation;
(9) 
Discharge from landscape irrigation or lawn watering;
(10) 
Water from individual residential car washing;
(11) 
Discharge from dechlorinated swimming pool water (less than one ppm chlorine) with written authorization to discharge received from the Authorized Enforcement Agency, provided the water is allowed to stand for one week prior to draining and the pool is drained in such a way as not to cause a nuisance;
(12) 
Street wash water by methods approved by City;
(13) 
Water used for dyed water testing, provided verbal notification is given to the Authorized Enforcement Agency prior to the time of the test;
(14) 
Nonstormwater discharge permitted under a NPDES permit or a Surface Water Discharge Permit, waiver, or waste discharge order administered under the authority of the United States Environmental Protection Agency or the Department of Environmental Protection, provided that the discharge is in full compliance with the requirements of the permit, waiver, or order and applicable laws and regulations; and
(15) 
Discharge for which advanced written approval is received from the Authorized Enforcement Agency as necessary to protect public health, safety, welfare or the environment.
The Authorized Enforcement Agency may suspend municipal storm drainage system access to any person or property without prior written notice when such suspension is necessary to stop an actual or threatened discharge of pollutants that presents imminent risk of harm to the public health, safety, welfare or the environment. In the event any person fails to comply with an emergency suspension order, the Authorized Enforcement Agency may take all reasonable steps to prevent or minimize harm to the public health, safety, welfare or the environment.
Notwithstanding other requirements of local, state or federal law, as soon as a person responsible for a facility or operation, or responsible for emergency response for a facility or operation, has information of or suspects a release of materials at that facility or operation resulting in or which may result in discharge of pollutants to the municipal drainage system or waters of the Commonwealth of Massachusetts, the person shall take all necessary steps to ensure containment and cleanup of the release. In the event of a release of oil or hazardous materials, the person shall immediately notify the Fire and Police Departments, Board of Health, and the Department of Public Works. In the event of a release of nonhazardous material, the reporting person shall notify the Authorized Enforcement Agency no later than the next business day. The reporting person shall provide to the Authorized Enforcement Agency written confirmation of all telephone, email, facsimile or in-person notifications within three business days thereafter. If the discharge of prohibited materials is from a commercial or industrial facility, the facility owner or operator of the facility shall retain on site a written record of the discharge and the actions taken to prevent its recurrence. Such records shall be retained for at least three years.