Illicit Discharge Detection And Elimination (IDDE) Investigations Standard Operating Procedures from the City of Durham, NC

Developed by the City of Durham Stormwater & GIS Services Division, this technical SOP document (2014) provides standardized procedures for identifying, investigating, and resolving illicit discharges within the municipal stormwater system. It helps field staff and program managers conduct complaint response, outfall screening, source tracking, documentation, and enforcement actions to ensure consistent implementation of the City’s IDDE program and compliance with MS4 permit requirements.