From the EPA:
An MS4 is a conveyance or system of conveyances that is:
To prevent harmful pollutants from being washed or dumped into MS4s, certain operators are required to obtain NPDES permits and develop stormwater management programs (SWMPs). The SWMP describes the stormwater control practices that will be implemented consistent with permit requirements to minimize the discharge of pollutants from the sewer system.
Meetings are held on the 4th Monday of the month directly following the 9:00 AM Commissioner's meeting. Held at the Administration Building in Goshen.