BOONE, Iowa—The fourth phase of the City of Boone’s Infiltration and Inflow Program will begin Monday, August 15th, with an evaluation of the targeted area. City crews with assistance from WHKS & Company, Engineers will be conducting smoke testing in the designated area.

The purpose of the smoke testing is to identify areas where unwanted storm water enters the sanitary sewer system. The smoke that is used is non-toxic, leaves no residue, and creates no fire hazard. City crews and WHKS personnel have distributed door hangers in the affected area to led residents know about the testing. Because of buildings downtown, residents may see drones being used for testing purposes. Additional information continues to be made available on the Boone City website.