Illicit Discharge Detection and Elimination

Recognizing the adverse effects illicit discharges can have on receiving waters, the permittee shall develop, implement and enforce a program to detect and remove illicit connections and discharges to the MS4. The program shall include measurable goals and include all of the following:

1. An ordinance or other regulatory mechanism to prevent and eliminate illicit discharges and connections to the MS4.

2. Initial field screening at all major outfalls during dry weather periods. At a minimum, field screening shall be documented.

3. On-going dry weather field screening of outfalls during the term of the permit. Outfalls that will be evaluated on an on-going basis and the field screening frequency shall be identified. Consideration shall be given to hydrological conditions, total drainage area of the site, population density of the site, traffic density, age of the structures or buildings in the area, history of the area and land use types. A description of this on-going field screening program shall be submitted to the Department in accordance with section 3.3.4 of the Permit.

4. Procedures for responding to known or suspected illicit discharges.

5. The permittee shall take appropriate action to remove illicit discharges from its MS4 system as soon as possible. If it will take more than 30 days to remove an illicit connection, the Department shall be contacted to discuss an appropriate action and/or timeframe for removal.

6. In the case of an illicit discharge that originates from the permittee's permitted area and that discharges directly to a municipal separate storm sewer or property under the jurisdiction of another municipality, the permittee shall notify the affected municipality within one working day.

7. The name, title and phone number of the individual(s) responsible for responding to reports of illicit discharges and spills shall be included in the illicit discharge response procedure and submitted to the Department in accordance with section 3.3.2 of the Permit.

Available Resources for NEWSC Members:

NEWSC Model Illicit Discharge and Connection Ordinance

IDDE Manual - January 2008
   updates posted October 2009
NEWSC_Illicit_Discharge_Manual_09162009
   Cover Page for NEWSC IDDE Manual   (MS Publisher Users Only)
Appendix_A_NEWSC_Spill_and_ID_Initial_Contact_Form_1142008
Appendix_B_NEWSC_spill_procedure_flow_chart_08312009
Appendix_B_NEWSC_spill_procedure_3rd_party_flow_chart 08312009
Appendix C - contacts for your adjoining communities
Appendix_D_WDNR_Substance_Release_Form_01142008
Appendix E RR558 1142008
Appendix F Spill reporting requirements PUB-RR-560pdf_1142008
Appendix_G_Sample_Chain_of_Custody_Form_01142008

IDDE Training Presentations
     IDDE Presentation - November 2007 - Implementing an IDDE Outfall Inventory (Town of Grand Chute)
     IDDE Presentation - August 2008 - Implementing an IDDE Program
     IDDE Presentation - February 2009 - Scenarios Group A
     IDDE Presentation - August 2009 - Scenarios Group B

Site Mapping Inventory - The Illicit Discharge Committee created a mapping inventory to get a better idea of what your community has in place regarding mapping needs for the DNR permit.
     Mapping Inventory - PDF Document
     Mapping Inventory - Word Document
     Mapping Inventory Responses Summary (11/1/05)

Other Resources:

The final version of the "Illicit Discharge Detection and Elimination Guidance Manual," available from the Center for Watershed Protection. This manual provides communities with solid, proven strategies for detecting and correcting illicit discharges. Produced under a cooperative agreement from EPA, this manual is available to download free, for a limited time.

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