Entire state meets 2010 air quality standard after Rhinelander mill ...
WEBJan 14, 2022 · The state came up with a plan to bring the mill into compliance, which the EPA reviewed and approved. "Some of the actions included the retirement of four coalfired boilers. They also changed their coal supply to reduce the sulfur content at the paper mill," said Jason Treutel, chief of the DNR's air quality planning and standards section.