The third Minimum Control Measure (MCM3) is Illicit Discharge Detection and Elimination. MS4 communities must develop and implement a plan to detect and eliminate illicit discharges to the storm sewer system (including developing a system map and informing the community about hazards associated with illegal discharges and improper disposal of waste).

CSN Reports:

U-6 Eliminating Individual Nutrient Discharges from Gray Infrastructure
U-9 Advanced MS4 IDDE Programs

CSN Webcasts:

http://chesapeakestormwater.net/2017/09/webcast-tracking-and-eliminating-illicit-discharges/

http://chesapeakestormwater.net/2015/02/webcast-discharge-discovery-techniques/

http://chesapeakestormwater.net/2015/01/nutrient-discharges-from-grey-infrastructure/