The smoke testing of sewer lines took place on July 9, to locate breaks and defects in the system.

Stated in Facebook post from the City of Waxahachie, "Beginning July 6, inspection crews will conduct a physical survey of the wastewater collection system. Pipeline Analysis will perform this study, which involves opening manholes in the streets and backyard utility easements. Information gained from this study will be used to repair and improve the wastewater collection system."

During this testing, white smoke exits through vent pipes on the roofs of homes and through sewer line breaks. Field crews are the testers of all sewers in the area.

The testing was originally scheduled for sometime in June but was rescheduled because of bad weather.

"The smoke is non-toxic, leaves no residue, and creates no fire hazard. The smoke should not enter your home unless defective plumbing exists or drain traps are dry. If you have seldom-used drains, please pour a gallon of water in the drain to fill the drain trap. This procedure will help prevent the possibility of smoke entering your living areas through those drains," according to a Facebook post from the City.