The process that allows crews to find leaks and other problems that contribute to sewer overflows. During the procedure, a contractor will blow smoke into manholes. If the smoke comes out of the sewer, it's an indication that the line may be cracked, have a bad joint or another deficiency. The smoke is non-toxic, non-staining, odorless and creates no fire hazard. It will be white or grey in color.
If residents find smoke in their home they should exit the building and look for City Utilities crews, who will be nearby. If residents are away and return home to find smoke in their home, they should call the 311 service center, so that City Utilities can investigate the problem. Testing is expected to be completed within two weeks.