In Minnesota, our storm sewer systems carry water directly to our lakes, rivers, and wetlands. This water does not go to a treatment plant before entering our surface water. To maintain fishable, swimmable, and drinkable water and prevent pollution from entering our waterbodies, only stormwater should enter a storm sewer system. If anything else, such as oil, chemicals, or sediment, enters the system it is usually an illicit discharge. Minimum Control Measure (MCM) 3 of the MS4 General Permit requires permittees to develop and implement a program to detect and eliminate illicit discharges within their storm sewer system.
The illicit discharge detection and elimination (IDDE) program must include:
Click on the blue links above in the "MS4 General Permit requirements" section to get more information and resources specific to those permit requirements. In addition, all resources related to MCM 3 are below.
Fact sheets and guidance documents should provide background information and tips to inform your approach to implementing MCM 3 - Illicit Discharge Detection and Elimination.
Fill in the blanks and adopt ordinance language that meets the regulatory mechanism requirements for MCM 3 - Illicit Discharge Detection and Elimination.
Documentation and tracking templates are examples that local stormwater staff are currently using to meet the MS4 General Permit requirements for MCM 3 - Illicit Discharge Detection and Elimination.
Example procedures are those that local stormwater staff are currently using to meet the MS4 General Permit requirements for MCM 3 - Illicit Discharge Detection and Elimination.
Below are examples, tools, or other resources to jump-start your illicit discharge detection and elimination training program.
These checklists can be used to meet the MS4 General Permit requirement for incorporating illicit discharge inspections into municipal inspections.