This presentation summarizes the important components of an effective illicit discharge detection and elimination (IDDE) program with tips for MS4 communities to build up their IDDE programs.

This presentation describes how certain land use practices can contribute to illicit discharges through leaks, spills or dumping, and how to prevent these discharges though good housekeeping practices.

This presentation provides an overview of field protocols for conducting outfall surveys to identify illicit discharges.

This presentation explains how and why specific water quality parameters are used to indicate potential illicit discharges during field screening of outfalls, confirm suspected discharges and track discharges to their sources.

This presentation provides an introduction to illicit discharge detection and elimination (IDDE) including types and sources of illicit discharges, terminology and regulatory requirements for NPDES Phase II stormwater permits.

This presentation describes methods for tracking confirmed illicit discharges to their sources and considerations for fixing these polluted discharges.

This presentation provides an overview of a desktop analysis to identify subwatersheds or stream reaches with high potential for having illicit discharges, as a way to target field surveys.