The Marquette City Commission will be participating in a tour of the Wastewater Treatment Plant, 1930 U.S. Hwy. 41 and Water Filtration Plant, 320 N. Lakeshore Blvd. No official business will be conducted. The tours will be held on Friday, July 21, at 9 a.m. and Friday, July 28, at 9 a.m.