The objective of the IDDE program is to find, fix, and prevent illicit discharges. The regulated small MS4 operator does this by gaining a thorough awareness of their storm sewer system and …

Jul 14, 2025 · IDDE stands for Illicit Discharge Detection and Elimination. It’s a required component of the EPA’s National Pollutant Discharge Elimination System (NPDES) permitting …

A recent focus of CWP’s assistance to communities on IDDE has been to quantify pollutant loads from illicit discharges so that communities can ultimately take credit for eliminating potentially …

Professional Development Hours Self-Declaration Form for Certified Professionals The following Self-Declaration form will be used by all professionals where classes and conferences do not …

IDDE Program Efectiveness Between 1998-2017 Shows the efectiveness of existing DEP programs at identifying and eliminating illicit discharges through the Shoreline Survey and …

The tracking, detection, and mitigation of illicit discharges is known as IDDE. An illicit discharge is defined as any discharge to the MS4 system that is not composed entirely of storm water, with …

A King County-led SAM project recently published the 2020 update to the Illicit Connection and Illicit Discharge Field Screening and Source Tracing Manual (IC-ID Manual), and created …

ILLICIT DISCHARGE DETECTION AND ELIMINATION (IDDE) DESCRIPTION intentionally dumped into the storm sewer system. The term ‘illicit discharge’ generally refers to any …

Illicit Discharge Detection & Elimination (IDDE) What is an Illicit Discharge? An illicit discharge is the discharge of pollutants or non-stormwater materials to the stormwater drainage system.

As the name “IDDE” suggests, detecting and addressing illicit discharges are the main goals of an IDDE program. Illicit discharges have two modes of entry into the MS4: direct or indirect entry. …