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Communications & News Releases

Posted on: November 30, 2023

"Smoke" testing resumes

“Smoke” testing is a method used by the City of Granbury to determine where rainwater is getting into the sanitary sewer system or to identify leaks or other bad connections. The “smoke” is non-toxic, non-staining, has a slight odor, is white to grey in color, does not create a fire hazard and is not harmful to people or pets.  

In the next few weeks, a company hired by the City will be “smoke” testing on both sides of U S Highway 377 between Davis Rd. and Fall Creek Highway by blowing “smoke” into the pipe network. Crews will look for “smoke” coming out through holes, manhole covers, plumbing vent pipes and other locations where rainwater can get into the sewer system. 

Smoke from the test could enter your home through floor drains and unused toilets, sinks or showers. While all drains have water traps to prevent fumes from entering homes, floor drains in basements or in garages can dry up. Make sure the drains in your house have water in them so they can prevent smoke from entering. Pour a bucket of water down floor, sink or shower drains or down any toilets that haven’t been used in a month.

Many apartment buildings have a basement common area for laundry or storage. If you are in an apartment, pour water down laundry tub or floor drains in these common areas. 

Call 911 if you are not certain that the smoke is the result of the City’s testing.

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