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Combined Sewer Overflow Information

As part of its National Pollutant Discharge Elimination System (NPDES) Combined Sewer Overflow (CSO) federal permit renewal requirements, the Village of North Riverside is required to update several plans and allow the public to comment on the plans at a public meeting. The Village has prepared the following required plans:


- CSO Operation and Maintenance Plan (revised 9/07)
- CSO Pollution Prevention Plan (revised 9/07)
- CSO Public Notification Plan (revised 9/07)

A full explanation of the NPDES CSO program can be found at the U.S. EPA’s website.


The Metropolitan Water Reclamation District (MWRD) maintains a network of flow monitoring devices throughout the Chicago area to detect combined sewer overflows. Up to date information is available at the MWRD’s website.

Information about the Tunnel and Reservoir Plan (TARP) is also available on the MWRD’s website.