MS4 Program - Storm Sewer Mapping



As part of the Franklin's Illicit Discharge and Elimination minimum control measure, the city has developed a storm drain system map showing the locations of all outfalls and the names and locations of all waterbodies receiving those discharges.  These maps are needed to help monitor dry weather flows to investigate potential pollutant discharge and it source.  Throughout the year, MS4 personnel inspect outfalls and conduct stream monitoring based upon point source and non-point source pollution potential of all mapped outfalls.  Should a discharge be discovered at an outfall, accurate mapping of the storm sewer system allows investigators to follow the pollution source. 


Pictometry Map - Storm System

 

Sources of illicit discharges may include illegal sewer hookups into the storm drain system, septic tanks, car wash or laundry washwater, improper disposal of motor oil or other household or auto fluids, or chemical spills.