The state of Michigan is accusing a former paper mill owner of sending contaminated waste to a composting site for decades in the Thumb region. The lawsuit seeks payments from Domtar Industries for identifying the contamination, near Port Huron, and to restore areas affected by PFAS. The lawsuit, filed Friday, accuses Domtar of knowing that the waste was contaminated, despite telling regulators that it was inert. There's been no comment from Domtar. The state says it learned about the contamination in 2019. PFAS compounds are called "forever chemicals" because they don't break down in the environment or the human body and can accumulate over time.Domtar, based in Fort Mill, South Carolina, said it doesn't comment on lawsuits.