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Sanitary Sewer Smoke Testing


Langley City will be conducting a harmless and non-toxic smoke test of the sewer system between July 15 to August 15, weather permitting.

Learn more about the safe and odourless smoke project by visiting


During the testing, you may see smoke emerging from roof vents of homes and businesses, seeping from the ground or manholes in the roadways. This smoke is safe, odourless, and does not pose a fire harzard. It should not enter your home unless there is a cross- connection, to the sanitary system, or a dry “P-trap” in a drain. Dry P- traps are typically present in toilets, sinks, bathtubs, showers and floor drains that are not regularly used.

Prevent smoke from entering your home or business, by pouring a minimum of three cups of water into all of the areas mentioned above, to ensure P-traps are full and form a water barrier.

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