The following connections are prohibited, except as provided in §
281-58C above:
A. Any drain or conveyance, whether on the surface or subsurface, that
allows any nonstormwater discharge, including sewage, process wastewater,
and wash water, entering the separate storm sewer system, and any
connections to the storm drain system from indoor drains and sinks.
Any drain or conveyance that delivers nonstormwater discharges directly
into wetlands, riparian buffers, or other waters of the commonwealth
is prohibited.