Nothing more exciting to Center staff than finding illicit discharges! Below are materials related to IDDE programs and wastewater control.
Illicit Discharge Detection and Elimination: A Guidance Manual for Program Development and Technical Assessments
Authors: Center for Watershed Protection; R. Pitt, University of Alabama Released: 2004
Guidance Manual 
Technical Appendices
Outlines practical, low cost, and effective techniques for Phase II NPDES MS4 communities and others seeking to establish Illicit Discharge Detection and Elimination (IDDE) programs and investigate non-stormwater entries into storm drainage systems. It details the types of testing used to detect illicit discharges, information on estimating program costs in terms of capital and personnel expenses, and timelines that estimate how long program implementation will take.
Outfall Reconnaissance Inventory (ORI) Field Sheet
Authors: Center for Watershed Protection Released: 2004
Form Form 
ORI Database 
Part of the llicit Discharge Detection and Elimination Guidance Manual, this form is designed to fix the geospatial location and record basic characteristics of individual storm drain outfalls, evaluate suspect outfalls, and assess the severity of illicit discharge problems in a community. Includes extensive description for completing the form. The Microsoft Access database can be used to record and manage ORI data.
Chemical Mass Balance Model (CMBM)
CMBM Setup 
CMBM Input File 
From the Illicit Discharge Detection and Elimination Guidance Manual Appendix I, the Chemical Mass Balance Model (CMBM). The CMBM is a more sophisticated technique used to differentiate among flow types at outfalls with blended flows. Included here for download are the executable file and a sample input file for the CMBM.
The Influence of Septic Systems at the Watershed Level
Authors: C. Swann Released: 2001
From Urban Lake Management, Watershed Protection Techniques 3(4), this article is part of an issue devoted to exploring how development impacts lakes and reservoirs, and examining ways to reduce these impacts with watershed management practices.
Annotated Septic System Bibliography
Authors: C. Swann Released: 1999
An exhaustive list of sources that address the Effects and Costs of Septic Systems Within the Chesapeake Bay
The Practice of Watershed Protection Articles
Below are articles from The Practice of Watershed Protection that pertain specifically to this topic. To purchase the hardbound book or CD of these articles, please visit our store. For citing these articles, add the article author and title to the following: The Practice of Watershed Protection. 2000. T. Schueler and H. Holland, eds. Center for Watershed Protection. Ellicott City, MD. Authors of each individual article can be found underneath the title in the file.
123. Dealing with Septic System Impacts
124. Recirculating Sand Filters: An Alternative to Conventional Septic Systems
125. Use of Tracers to Identify Sources of Contamination in Dry Weather Flow
