Wisconsin AG sues 18 companies over PFAS contamination MADISON, Wis. (AP) — Wisconsin Attorney General Josh Kaul filed a lawsuit Wednesday seeking to force nearly 20 companies that he alleges contaminated the environment with chemicals known as PFAS to reimburse the state for investigations and cleanup efforts. The lawsuit, filed in Dane County circuit court, names 18 companies as defendants, including 3M Company, Tyco Fire Products LP, and BASF Corporation. The filing alleges the defendants knew or should have known that their products would have a dangerous impact on the public’s health and environment. The lawsuit seeks punitive damages as well as reimbursement for the costs of investigations, cleanup and remediation. “To this day, the State continues to take necessary actions to protect its natural resources and its residents from harm caused by PFAS contamination,” the lawsuit states. “The State and its taxpayers will need to spend billions of dollars remediating the dangerous PFAS contamination caused by Defendants’ wrongful, deceptive and tortious conduct.” Media officials for 3M, Tyco and BASF didn’t immediate respond to messages seeking comment.