Detect, assess, and reduce inflow and infiltration with engineering-grade data, specialised inspections, and long-term remediation strategies. Civica delivers integrated field and consulting services to municipalities, engineers, and developers across Ontario, to improve sanitary sewer performance.

Inflow & Infiltration (I&I) occurs when groundwater or stormwater that does not need to be treated enters the sanitary sewer system through cracks, defects, or improper connections. Excess I&I reduces system capacity, increases treatment costs, and raises the risk of flooding and overflows, placing additional strain on wastewater treatment facilities.
To calculate how much I&I is entering the system, engineers use flow monitoring, which measures wastewater movement over time and compares it to expected baseline conditions. This data helps quantify the volume of extraneous water, pinpoint areas where I&I is most significant, and identify when and where sewer maintenance is needed.
Civica recognizes the costly impacts and the environmental repercussions that can arise from Inflow and Infiltration (I&I) in wastewater systems. With our expertise and experience in identifying, prioritizing, and remediating I&I defects through comprehensive inspection, we can help prevent these events from happening.
Our projects improve conditions and resiliency of wastewater sewer systems and enhance infrastructure on private property while ensuring stakeholder satisfaction. We have a unique delivery model to improve and increase capacity in sanitary sewer systems, while allowing new developments to proceed. These projects will defer the need to add new system capacity, saving municipal money associated with replacing and upgrading high-cost infrastructure.

Explore how our inflow and infiltration solutions have been applied across real municipal and development projects.