INI stands for inflow and infiltration. In simple terms, it means clear water is getting into the sanitary sewer system where it does not belong. Some Twin Cities metro cities require an INI inspection before a property can transfer ownership.
Why cities care about inflow and infiltration
Clear water entering the sanitary sewer system can overload pipes, lift stations, and treatment systems. The Metropolitan Council explains that inflow and infiltration adds excess water to the regional wastewater system and can create capacity and treatment problems.
Reference: Metropolitan Council inflow and infiltration information.
What this means during a sale
If a city requires an INI inspection, it can become part of the closing process. Waiting too long can create delays. If the inspection finds a defect, a repair may be required before transfer or handled according to the city’s rules.
Why camera inspection matters
A sewer camera inspection can identify defects, openings, roots, damaged pipe, and other conditions that may affect compliance. It also helps the buyer, seller, and city understand what is actually happening underground.