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As part of MDOT's Illicit Discharge Elimination Program (IDEP), employees are trained and educated to identify illicit connections or discharges to department's drainage system. The most common warning signs of illicit discharges are dry weather flow, suds, sewage, oil and gas. In addition, MDOT field crews investigate point source discharges (PSDs) as part of their dry weather screening component of IDEP. A PSD is an outfall from a drainage system to waters of the state, or a point where a stormwater drainage system discharges into a system operated by another public body.
Illicit discharge is any discharge (or seepage) to the separate stormwater drainage system that is not composed entirely of stormwater or uncontaminated groundwater.
Illicit connection is any direct or indirect connection to the MDOT drainage system that is not entirely composed of stormwater and/or not permitted by MDOT.
Report suspected illicit discharge* anonymously to the Pollution Emergency Alerting System (PEAS) hotline at:
Protect the quality of streams and public health, report illicit discharges.
*This includes dumping of waste/oil or other vehicle fluids and suspicious pipes outletting to ditches.