A city contractor will conduct smoke testing of the sanitary sewer system across the city for several weeks, according to a city press release.

The work was originally scheduled for last week but was rescheduled due to Hurricane Florence. Residents in the affected areas have been notified of the change.

This week, Hydrostructures, which is a contractor working on behalf of Suffolk’s Public Utilities department, will conduct smoke testing in Riverside Estates, Riverfront, Barrett Acres and Olde Town — the area bound by Finney Avenue, Holladay Street, East Washington Street and North Main Street.

Additional testing has been added to the schedule for the week of Sept. 24 in Applewood, Harbour View East Village, Hargrove Tavern, Reids Crossing and Mill Creek Close.

The testing is done by injecting opaque-colored smoke through the sewer pipes to locate deficiencies. The deficiencies they are looking for can contribute to overflows within the sanitary sewer system.

The smoke is non-toxic, harmless and creates no hazard to the public, the press release states.

For more information, contact Jarrett Moran, Public Utilities engineering manager, at 514-7024.