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    Publications & Resources

    Technical Guides

    Illicit Discharge Detection and Elimination Manual

    This manual provides useful tools to aid operators of regulated small municipal separate storm sewer systems (MS4s) in complying with a key element of EPA's NPDES Phase II Storm Water Program: illicit discharge detection and elimination (IDDE). Illicit discharges are non-storm water discharges into MS4s, for example from a home's sanitary wastewater pipe that has been mistakenly connected to the storm sewer system. Detection and elimination of these discharges is one of the six mandatory pollution control measures required of operators of regulated small MS4s by EPA's Phase II storm water regulations. The manual provides an overview of the IDDE component of the Phase II regulations and provides practical information on various approaches municipalities can use to carry out the requirements of the regulations.

    Download the manual (PDF).

     

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