Beginning Monday, Clearwater Public Utilities Department will begin smoke-testing the wastewater sewers to determine if there are any areas where stormwater or groundwater is entering the system. Phase 1 will be in the areas bordered by Drew Street, Gulf-to-Bay Boulevard, Star Crest Drive and Lake Avenue. Phase 2 will begin in a few months and will be conducted in the eastern part of the city. Colored smoke will be circulated into the sewer lines and manholes to locate broken pipes and other defects. White smoke will exit from the vent pipes on home roofs. The smoke is non-toxic, leaves no residue and creates no fire hazard. The smoke will not enter a house unless there is defective plumbing present or the drain traps are dry. If potential problems are found on private property, residents will be notified of repairs they may have to make. For information, residents should call the wastewater collection division at 562-4960 or Clearwater customer service at 562-4600.