From 2019 to 2022, the average raw water turbidity at the Oshkosh Water Filtration Plant increased from 6 to 7.4 NTU while the maximum rose from 9.8 to 12.8 NTU.
In August 2022 Mike Harris, a diver with Northern Divers USA, visually inspected the 2,600-foot-long, 60-inch primary...