Inflow Removal Program

What is the Inflow Removal Program?


The Inflow Removal Program is the means for the City to work with property owners to redirect the flow of “clean water”, such as stormwater and groundwater, from going into the City’s sanitary sewer system.

What is Its Purpose?


The removal of clean water sources inflow to the sanitary sewer system allows the sewer’s pipe capacity to be used for its intended purpose, which is transmission of sewage to the City’s wastewater treatment plant.  This “freeing up” of available sewer capacity results in fewer sewage backups within the system.  In addition, clean water inflow to the sanitary sewer system is illegal based on State Law (i.e., Plumbing Code) and the City of Lansing’s Codified Ordinances.

Why is it important?


The City is completing a long-term program to separate its combined sewer system. This is required to prevent combined sewage overflows into the Grand and Red Cedar Rivers. Once the system has separate sanitary and storm sewers, all stormwater will need to be directed to storm sewers or basement backups could occur. Believe it or not, a single downspout illegally connected to the City’s sanitary sewer can lead to a basement backup at a nearby home! Each property owner is responsible for making sure that all sources of water from their property are routed correctly.

Related Documents


Typical Inflow Diagram (PDF)
Inflow Informational Brochure (PDF)