Illicit discharges are considered “illicit” because Municipal Separate Storm Sewer Systems (MS4s) are not designed to accept, process, or discharge such non-storm water wastes.
Towns/Cities in Johnson County designated as MS4 entities have adopted an illicit discharge ordinance prohibiting “any substance other than storm water” to directly discharge or travel to the storm sewer system.
Prohibited discharges include:
Prohibited discharges are listed in each MS4 community’s illicit discharge ordinance. If you would like more information, contact your local MS4 entity.
If you notice an illicit discharge, please report it to the MS4 Operator in the designated MS4 entity area (whether it’s Greenwood, Franklin, Edinburgh, Bargersville, New Whiteland, Whiteland, or Johnson County).