From Michigan to the Nation – A Groundwater Emergency Furious and fearful, residents are asking a simple but urgent question: what’s in my water? PFAS chemicals are the tip of the spear for threats to groundwater in Michigan and nationally. Nitrates, industrial chemicals, and pathogens have been swept underground for decades — aquifers used as garbage cans. What else is in the groundwater? And what are the risks? This H2O Catalyst rounds up the experts who provide answers to listeners toughest questions.