ProPublica's investigation highlights a contentious debate over fluoride in St. Clair County, Michigan's drinking water. Dr. Remington Nevin, the county's medical director, wants to prohibit fluoride, calling it a potential developmental neurotoxicant. This proposal has ignited passionate arguments at public meetings, with some residents supporting Nevin's stance. Opponents, including dentists, argue against removing fluoride, citing its proven benefits in preventing tooth decay, especially for low-income communities. Nevin's primary evidence is a report suggesting links between high fluoride levels and lower IQs, though this report is contested. Nevin’s approach potentially impacts the entire state, though the proposal's traction is uncertain. County officials and state agencies now find themselves at odds over the issue. Nevin has a history of expressing views against mainstream ideas and has also distributed material by Robert F. Kennedy Jr., who shares his skepticism towards fluoride. This issue reflects a larger, growing trend of fluoride skepticism. The debate highlights the tension between public health recommendations and individual concerns.