Which non-storm water discharges are generally not permitted under municipal NPDES storm water discharge permits?

The non-storm water discharges that are generally not permitted under municipal NPDES storm water discharge permits include those that can introduce pollutants into storm water systems and can negatively impact water quality. In this context, automobile detailing practices typically involve the use of various cleaning agents, waxes, and other materials that can generate runoff containing harmful pollutants.

Because detailing often occurs in locations where runoff can flow directly into storm drains or local water bodies, these activities present a significant risk for contaminating storm water with chemicals and debris. As a result, municipal NPDES storm water discharge permits generally prohibit these types of non-storm water discharges to protect water quality and public health.

In contrast, cooling water, sanitary wastewater, and process water often have specific management practices or regulations that allow them to be treated or released under controlled conditions. For example, cooling water discharges might be permitted if they are managed properly and meet criteria established by regulatory agencies.