LANSING, Mich. (AP) — While the city of Flint still recovers from a lead-tainted water crisis, Michigan is scrambling to combat potential health risks in other tap water that stem from chemicals long used in firefighting, waterproofing, carpeting and other products. Per- and polyfluoroalkyl substances, or PFAS, have been detected at military bases, water treatment plants and, most recently, an old industrial dump site for footwear company Wolverine World Wide.