06/03/2026
The City of Galion, in partnership with Wessler Engineering, will conduct smoke testing throughout the sanitary sewer system beginning on June 10.
Smoke testing is part of a study to reduce rainfall and groundwater from entering the sanitary sewer and serves as an important tool to meet Ohio EPA requirements. It involves blowing liquid smoke into parts of the sanitary sewer system to determine the location of leaks. The smoke used for testing is manufactured specifically for this application and is non-toxic and non-staining. It has an oily odor, but is clean and harmless to pets, food, and material goods.
Door knockers will be circulated in each area prior to beginning the testing. Please note you are NOT required to be home during this process. The project should be completed in approximately six weeks, weather permitting.
If the plumbing in your home is working properly, the smoke used to conduct this test should not enter your home. You may see smoke coming from the vents on the roof, but this indicates a properly working sewer vent. If any smoke is visible inside, it should clear within a few minutes.
An informational video is available on the City of Galion website in order to provide residents with a better understanding of what to expect: https://galion.city/436/Inflow-and-Infiltration-II
Recommendations:
• Run your sink faucets before smoke testing. Smoke often enters through fixtures which are not routinely used (examples: dry P-traps and J-tubes beneath sinks, showers, and floor drains).
• Close toilet lids. This is the best means of preventing smoke from entering your home.
• Open windows and/or doors to allow smoke to clear.
Inflow and Infiltration (I&I) is the process where stormwater and groundwater enter sanitary sewer systems. This overloads the sewer network, leading to expensive treatment costs, increased wear on pumps, and untreated sewage overflows into homes and the environment.