STELLA, Wis. (AP) — Kristen Hanneman made a small decision in 2022 that would upend life for her entire town. State scientists were checking private drinking water wells across Wisconsin for a widely used family of harmful chemicals called PFAS . They mailed an offer to test the well outside her tidy farmhouse surrounded by potato farms cut out of dense forest. Without much thought, she accepted. Months later, Hanneman found herself on the phone with a state toxicologist who told her to stop