Illicit Discharge Detection & Elimination (IDDE)

Keep Greenfield safe by preventing storm water pollution and illicit discharges.  An illicit discharge is a substance other than storm water that is release to a storm drain, storm sewer or other drainage system that discharges to our lakes and rivers.   These substances are considered “illicit”, or banned, because they are not storm water and are hazardous to our water resources.

Examples of illicit discharges can include sanitary sewer waste, lawn fertilizers, vehicle fluids, paints, concrete washout, and other hazardous wastes.

For addition resources so you can learn more about illicit discharges, how to identify and prevent them, and how to properly dispose of hazardous wastes, please refer to the following resources:


Illicit Discharges — Respect Our Waters

Illicit+Discharge.PDF (

Report A Storm Water
Pollution OR IDDE Issue

Report Form

Engineering Division

7325 W. Forest Home Ave.
Greenfield, WI 53220