A. 
Any drain or conveyance, whether on the surface or subsurface, which allows any nonstormwater discharge including sewage, process wastewater, and wash water to enter a regulated small MS4 or to enter the waters of this commonwealth is prohibited.
B. 
No person shall allow, or cause to allow, discharges into a regulated small MS4, or discharges into surface waters of this commonwealth which are not composed entirely of stormwater, except 1) as provided in Subsection C below, and 2) discharges allowed under a state or federal permit.
C. 
The following discharges are authorized unless they are determined to be significant contributors to pollution of a regulated small MS4 or to the waters of this commonwealth:
(1) 
Discharges from firefighting activities.
(2) 
Potable water sources, including water line flushing and fire hydrant flushing, if such discharges do not contain detectable concentrations of total residual chlorine (TRC).
(3) 
Noncontaminated irrigation drainage.
(4) 
Noncontaminated HVAC condensation and water from geothermal systems.
(5) 
Diverted stream flows and springs.
(6) 
Noncontaminated hydrostatic test water discharges, if such discharges do not contain detectable concentrations of TRC.
(7) 
Pavement wash waters where spills or leaks of toxic or hazardous materials have not occurred (unless all spill material has been removed) and where detergents are not used.
(8) 
Flows from riparian habitats and wetlands.
(9) 
Noncontaminated water from foundations or from footing drains and crawl space pumps.
(10) 
Lawn watering and landscape drainage.
(11) 
Dechlorinated swimming pool discharges.
(12) 
Noncontaminated groundwater.
(13) 
Water from individual residential car washing where cleaning agents are not utilized.
(14) 
Routine external building wash down (which does not use detergents or other compounds).
D. 
In the event that the municipality or DEP determines that any of the discharges identified in Subsection C, significantly contribute pollutants to a small MS4 or to the waters of this commonwealth, the municipality or DEP will notify the responsible person(s) to cease the discharge.
Roof drains and sump pumps shall discharge to infiltration or vegetative BMPs and to the maximum extent practicable satisfy the criteria for disconnected impervious areas.
No person shall modify, remove, fill, landscape, or alter any SWM BMPs, facilities, areas, or structures that were installed as a requirement of this chapter without the written approval of the municipality.