During periods of heavy rainfall or snow melt, some wastewater systems are designed to occasionally overflow and discharge excess untreated sewage directly to nearby streams, rivers or other water bodies. These discharges are known as combined sewer overflows and are common in many cities nationwide.
Permit Conditions
The Illinois Environmental Protection Agency (IEPA) under the authority granted by the United States Environmental Protection Agency (U.S EPA) issued a National Pollutant Discharge Elimination System (NPDES) permit to the Village of La Grange Park for the operation of its combined sewer system overflow (CSO) structure. The condition of the permit require the Village to develop and maintain a plan for public notification, education and comment concerning combined sewer system operations and the operation of the overflow structure.
Municipal Code
In accordance with the Village’s Municipal Code:
- Sewer §50.40 Generally: No person shall discharge or caused to be discharged any storm water, ground water, roof runoff, subsurface drainage, uncontaminated cooling water or unpolluted industrial process waters to any sanitary sewer.
NPDES (MS4)
2013 Notice of Intent