The Wisconsin Department of Natural Resources has issued two notices of air quality violations, citing 27 total violations that have occurred since the refinery returned to service in 2023. Wisconsin Public Radio reports that the violations include exceeding emission limits for their permit and failing to monitor their emissions. Another issue, according to the WPR, is that there isn't enough air quality monitoring. The nearest air quality monitoring the DNR uses is in Duluth, and that didn't even detect the 2018 refinery explosion. That means the only refinery operating in Wisconsin doesn't have an official air quality monitor sufficient enough.