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Smoke Testing - Sewer Lines

Smoke Testing Newsletter - 6/14/21 (pdf)

City of Cokato Public Works will be conducting smoke tests of sanitary sewers in the Southwest
portion of the community the week of Monday June 14, 2021 (weather pending)

These tests will assist us in locating breaks and defects in the sewer system. During the test,
YOU MAY SEE SMOKE COMING FROM VENT STACKS ON BUILDINGS OR FROM HOLES IN THE
GROUND. Don’t be alarmed. The smoke is non-toxic, non-staining, has no odor, does not
create a fire hazard, and will dissipate in a few minutes.

Before we conduct the smoke test, please pour water into your basement floor drains and
into any unused sinks. This will seal the drain traps so that smoke will not enter your building
through the drain.

If smoke should enter your building during the test, it probably means that there are defects in
the plumbing that could allow DANGEROUS SEWER GAS to enter. Note the location of the
smoke and call 320-286-5505 to arrange a meeting with our inspector. Open doors and
windows to ventilate any smoke that enters the building.

Please notify us before we conduct the test if you have any of the following situations:
  • Dogs, birds and other pets that will be confined alone in the building during the test.
  • Any persons who will be sleeping during the test.
  • Any individuals with respiratory problems who will be in the building.
  • Elderly persons who will be alone and might be alarmed or confused if they see smoke.
If you have any questions regarding the smoke testing please call 320-286-5505.
For more information here is a 2 minute video that explains more about the process.
https://www.youtube.com/watch?v=GIq3hrPy37s