The City of Barrie is undertaking a comprehensive review and analysis of its entire wastewater network to investigate and identify likely sources of inflow and infiltration (I&I). I&I refers to rainwater and groundwater that enter the sanitary collection system and reach the Wastewater Treatment Facility (WwTF), which increases treatment costs and reduces the system’s overall capacity.
The project will focus on determining problematic areas within the sanitary collection system and providing recommendations to mitigate these flows. Flow monitoring data will highlight areas experiencing high I&I, which will then be further investigated through fog testing to pinpoint specific sources of inflow (stormwater) or infiltration (groundwater).
Project Updates
November 21, 2025
Fog testing works are planned to take place on Carley Crescent, Gregory Court and Newberry Court on November 24–28, 2025. If the weather is unfavourable, the work is expected to take place the following week, December 1–5, 2025. A November 2025 notice re fog testing works will be delivered to impacted properties.
Fog Testing of Sanitary Sewer Works
The City and its consultant will conduct fog testing of sanitary sewers within the City’s urban boundaries. Fog testing helps identify potential points where stormwater enters the sanitary system, which can increase the risk of basement flooding and add unnecessary costs to wastewater treatment. The areas planned for testing are subject to change.
Schedule
| Study Commencement | August 2024 |
|---|---|
| Wastewater Flow Monitoring | Sept 2024 to July 2025 |
| Fog Testing | Fall 2025 to Fall 2026 |
| Study Completion | TBD |