KINGSPORT, Tennessee — A new wastewater treatment system at Domtar’s Kingsport mill is still on schedule to start running later this year, part of an effort by the mill to mitigate odors affecting neighboring residents. Mill Manager Tony Clary updated the Kingsport Economic Development Board on the project’s timeline, the construction of an anaerobic digester, at the board’s monthly meeting Tuesday. The project is at a halfway point, and the new system is expected to ramp up at the end of the year. The mill faced scrutiny from city officials and residents over odors emitting from its wastewater after the site converted from manufacturing paper to recycling containerboard in 2023. The company secured funding to construct a new wastewater treatment system in December 2024 and broke ground in August 2025.