Any drain or conveyance, whether on the surface or subsurface, that 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.
No person shall allow, or cause to allow, discharges into a regulated small MS4, or discharges into 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.
The following discharges are authorized unless they are determined to be significant contributors to pollution to a regulated small MS4 or to the waters of this commonwealth:
Discharges from firefighting activities.
Potable water sources, including water line flushing.
Water from crawl space pumps.
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.
Diverted stream flows.
Flows from riparian habitats and wetlands.
Uncontaminated water from foundations or from footing drains.
Dechlorinated swimming pool discharges.
Water from individual residential car washing.
Routine external building wash down (which does not use detergents or other compounds).
The following applies to new construction commenced after the effective date of this chapter and which results in the creation of over 2,500 square feet of impervious surface area: Roof drains and sump pumps shall discharge to infiltration or vegetative BMPs or to a drainage system ultimately discharging into such BMPs.
It is unlawful for any person to modify, remove, fill, landscape, or alter any approved SWM BMPs, facilities, areas, or structures without the written approval of DEP or a delegated County Conservation District, and the municipality.