Municipal Separate Storm Sewer Systems (MS4)
Local Laws pertaining to MS4
Per the NYS Department of Environmental Conservation, an illicit discharge is defined as discharges not entirely composed of stormwater into the MS4. Examples of illicit discharges are non-permitted sanitary sewage, garage drain effluent and waste motor oil. However, an illicit discharge could be any other discharge that could be a substantial contributor of pollutants to the MS4.
Storm water Best Practices