Inflow and Infiltration

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The Inflow and Infiltration (I/I) Compliance Program is being required by the Metropolitan Council as a result of excessive clear water entering the sanitary sewer system. West St. Paul received a surcharge of $2.7 million in 2015, based on the excess sanitary flow experienced during a significant June, 2014 rainstorm. The surcharge can be avoided by developing a program to eliminate the I/I problem.

View an illustrated guide to understanding I/I

Learn More about the Metropolitan Council's I/I program

The West St. Paul I/I program has been designed to be less time sensitive and hopefully less financially onerous to residents and the community. In addition, the City Council is committed to providing more help and guidance as residents go through the necessary inspection and possible repairs to come into compliance.

I/I Compliance Program Includes the Following

  • The effective date for owner occupied single-family homes is January 1, 2017. The effective date for all other properties is July 1st, 2016.
  • The intent for homesteaded residential properties is to address areas of I/I non-compliance at the time of selling your property. This means that when you put your property up for sale, you will need to get an inspection of your sanitary sewer service to determine areas of non-compliance. You can either bring your system into compliance prior to the sale or negotiate with the buyer regarding how the repair will be handled. The ordinance requires that properties be brought into compliance within 12 months from the sale of the property.
  • Inspections will be provided for free, however property owners will be expected to assume any financial costs associated with providing an acceptable access point to sanitary sewer service line and any service line clean-out (root removal) required for the inspection to take place.
  • If your street is reconstructed as part of the City’s annual street improvement program, the City will arrange with you to have your sanitary sewer service lined inspected. You will be encouraged, but not required, to address any areas of I/I non-compliance during the summer street work.
  • Any service line repairs will need to be accomplished from outside of the right of way. No excavation will be allowed to occur in the road right of way except for emergency situations, in which case City approval is required.
  • Property owners are responsible for making any sanitary sewer line repairs from the building to its connection with the city main underneath the public street.
  • The I/I program will be administered and managed by the City. 
  • The City will reimburse 15% (up to $5,000) of the repair costs. Property owners may also have the balance of any costs special assessed against their property which would be paid with their property tax payment over the course of ten years. Qualifying seniors may also receive deferred assessments. 


Contact Inflow & Infiltration Coordinator, Eldon Rameaux, with any questions at 651-552-4137 or by Email.