Illicit Discharge Detection and Elimination

The illicit discharge detection and elimination (IDDE) minimum control measure consists of best management practices (BMPs) and program elements that focus on finding and addressing non-stormwater discharges and/or non-permitted discharges that may be entering the municipal separate storm sewer system (MS4).

Illicit discharges can come from a wide-range of sources including illegal dumping of paints, hazardous wastes, and wash-water, as well as improper connections of sanitary sewer lines or laundry waste to the stormwater system. Illicit discharges can seriously degrade water quality and are a widespread problem especially in commercial and other high risk areas. However, because these sources are intermittent, and sometimes not visible, they often go undetected.