Infiltration/Inflow Control Program (IICP)
Excessive infiltration and inflow (I/I) into the sanitary sewer system is a serious problem that contributes to sanitary sewer overflows (SSOs) and basement backups (BBs). The Environmental Protection Agency (EPA) and the Illinois EPA (IEPA) imposed special conditions in the National Pollutant Discharge Elimination System (NPDES) permits issued for the MWRD’s Water Reclamation Plants (WRPs) that requires tributary local separate sanitary sewer satellite entities to implement measures in addition to those required under the 1985 Sewer Summit Agreement if excessive I/I in the system causes or contributes to SSOs or BBs. Due to this mandate, the MWRD incorporated an updated Infiltration and Inflow Control Program (IICP) that was developed with the help of an Advisory Technical Panel (ATP) into the Watershed Management Ordinance (WMO).
The MWRD has developed a Technical Guidance Manual (TGM) to provide satellite entities assistance on the IICP requirements and compliance.
The MWRD distributes annual status reports on the Infiltration / Inflow Control Program.
Annual Reporting Forms and SSO and BB Internal Summary Form
Email the completed Annual Summary Report to email@example.com.
Previous I/I workshop and meetings:
If you have any questions about the Infiltration/Inflow Control Program, contact Ms. Ann Gray at GrayA@mwrd.org.