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Illicit Discharge 

Reporting Directory

An illicit discharge is defined as any discharge to the storm sewer system that is not composed entirely of stormwater, except for discharges allowed under an NPDES permit or waters used for firefighting operations.  An illicit connection is a physical connection to an MS4 that primarily conveys non-stormwater discharges other than uncontaminated groundwater into the MS4.

Report illicit discharges, connections, and illegal dumping into storm drains, streams and other water bodies to your community.  Links and phone numbers to GLRC communities are located here:




Report ANY dumping into storm drains, streams, or other water bodies.

You may also contact the Michigan Department of Environment, Great Lakes, and Energy’s Pollution Emergency Alerting System (PEAS) at 800-292-4706.

Sometimes a series of discharges from nonpoint sources results in pollution like Harmful Algal Blooms (HABs). HABs are blooms of Cyanobacteria, also known as blue-green algae, in lakes, rivers, streams, and ponds. They can release toxins at certain times that can make humans and animals sick. HABs are caused by nutrient pollution from things like lawn and farm fertilizers, stormwater runoff, animal manure, detergents, sewers, and malfunctioning septic systems. Learn more about HABs and how to identify and report them in the above video from Michigan Department of Environment, Great Lakes, and Energy.


Take these simple steps to prevent the spread of Harmful Algal Blooms:

  • Use phosphate-free detergents

  • Properly dispose of pet wastes

  • Apply fertilizers only when necessary and at the recommended amount

  • Take care to not spread aquatic invasive species while boating and fishing

  • Volunteer in local watershed protection efforts

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