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IDDE Program

IDDE Program Overview

StormwaterONE’s online course for Illicit Discharge Detection and Elimination (IDDE) covers key components necessary for a Municipal Separate Storm Sewer System (MS4) to develop and maintain an IDDE Program.  This course covers the available tools that are associated with the National Pollutant Discharge Elimination System (NPDES) of the Clean Water Act (CWA) to establish or re-establish your MS4 IDDE Program. 

This course provides insight into finding the sources of discharges and highlights problems in identifying illicit discharge sources.  This course also provides information on illicit discharge detection, clues and possible findings, conducting inspections and sampling as well as non-stormwater outfall discharges with examples. 

In addition outfall monitoring, program mapping considerations, common approaches to outfall screening including typical physical and chemical indicators are covered.  Information on inspection documentation, investigation, reporting and environmental crimes are covered.  Lastly, it provides tips on developing an effective IDDE Program.

As authorized by the Clean Water Act (CWA), the NPDES permit program controls water pollution by regulating point sources that discharge pollutants into waters of the United States.  The NPDES program has Phase I and Phase II rulings and control measures.  This course defines where IDDE is one of the six (6) Minimum Control Measures (MCMs) that the operator of a Phase II regulated small MS4 is required to include in its stormwater management program to meet the conditions of the NPDES permit.

Intended Audience

The audience for this course includes stormwater personnel responsible for detecting and eliminating illicit discharges regulated by a Municipal Separate Storm Sewer System (MS4) Phase I and Phase II entity. 

Curriculum: Illicit Discharge Detection and Elimination (IDDE)

Illicit Discharge Detection and Elimination (IDDE) is the third Minimum Control Measure (MCM) in the MS4 Phase II of the NPDES permit as follows:


  1.        Public Education
  2.        Public Involvement
  3.        Illicit Discharge Detection and Elimination (IDDE)
  4.        Construction
  5.        Post-Construction Runoff Control
  6.        Pollution Prevention/Good Housekeeping

Learning Objectives

At the completion of this course, the student will be provided the resources necessary to explain and administratively establish the IDDE program as well as to:

--  Define fundamental Illicit Discharge Detection and Elimination (IDDE) rules and regulations for stormwater management.

--  Administratively establish fundamental IDDE procedures to protect water quality, our environment and surface waters.

--  Explain types of illicit discharges and the monitoring programs used to control runoff at the source.

--  Detect visual, non-visual and physical indicators when an illicit discharge may have occurred and the setup procedures to conduct inspections.

--  Implement IDDE goals, practices, tools, inspection methods and required documentation.

At the Completion of This Program You Will Receive

2.5 PDHs

Resume' Enhancer (Available on the Credential Validation Page)

Comprehensive and Easy to Retain

The class was very comprehensive and easy to retain. I was able to complete in one sitting and is exactly what I needed for required employment certification.

Rating: 5.0 / 5.0

Matt L., City of Insanti
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