Attendees are invited to join a 60-minute tour of Madison Metropolitan Sewerage District’s Nine Springs Wastewater Treatment Plant, where 35 million gallons of wastewater are transformed each day into clean river water and other renewable resources. The tour is mostly outdoors and follows the path of water from dirty to clean, with stops to view key steps of the treatment process. Tour attendees are required to wear closed-toe shoes and should dress for the weather.