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The City of Belmont is conducting sanitary sewer smoke testing to help identify and mitigate infiltration and inflow (I&I), which occurs when groundwater and stormwater enter our closed wastewater infrastructure, including sewer pipes.  Infiltration occurs when the groundwater table rises, allowing water to push into cracks, joints, seams, and older parts of our infrastructure.  Inflow...

No. The smoke is non-toxic and harmless. It is light in color, leaves no residue, and does not create a fire hazard. People with particular respiratory sensitivity should avoid exposure to all types of smoke.

This could mean that a drain on the property is connected to the sewer lateral or that the lateral has breaks or cracks in the pipe, causing drain runoff that contributes to sewer backups and overflow.

Yes, smoke alarms may be activated by testing. Open windows or doors for ventilation if possible.