The Pennsylvania Departments of Environmental Protection and Health and the Pennsylvania Fish and Boat Commission announced on October 7 a "Do Not Eat" advisory for fish in the Wissahickon Creek Basin, MoreThanTheCurve reported. Patch reports the cause of the PFOS contamination is not clear, and officials have not said publicly where it may have come from. Until that gets sorted out, anyone fishing the creek should read the advisory before anything lands on a dinner plate.