Fall System Flushing. The Middleton Water Utility will be flushing mains and hydrants on Monday, September 9th, beginning at 7:00 pm until 5:00 am. They will be flushing North of University Ave., East of Parmenter St., and West of Allen Blvd. A slight discoloration of the water may be noticed during this time period. Your cooperation and indulgence is appreciated. Thank you.