Infiltration/Inflow Control Program
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.
I/I Information Pamphlet for Homeowners
A Long Term Operation and Maintenance Program and Private Sector Program outline has been developed to indicate minimum requirements and aid in the creation of these programs.
Appendix D includes sample completed report forms and program templates.
Annual Reporting Forms and SSO and BB Internal Summary Form
Email the completed Annual Summary Report to firstname.lastname@example.org.
Previous I/I meetings and resources:
The IICP TGM makes references to the 1989 Manual.
If you have any questions about the Infiltration/Inflow Control Program, contact Ms. Ann Gray at (312) 751-3085, GrayA@mwrd.org, or the below address.
Engineering Department - Local Sewers System Section
Metropolitan Water Reclamation District of Greater Chicago
111 East Erie Street
Chicago, IL 60611-2893