The city of Madison will conduct smoke testing of sewer lines Thursday on the hilltop to check for possible leaks.

Work is expected to begin at 1 p.m. near the intersections of Cragmont and Eighth streets and Montclair and Wood streets.

If area residents notice smoke in their homes, they are asked to ventilate the house by opening windows or doors and then contact the sewer department at (812) 265-8312.