For about 50 years, adding cavity-preventing fluoride to drinking water was a popular public health measure but opposition points to a recent federal judge’s decision that ordered U.S. regulators to consider the risk that fluoride in water could cause lower IQ in kids. (AP video by Mary Conlon/AP produced by Javier Arciga)

Fluoride in water is a public health success story but opposition persists

For about 50 years, adding cavity-preventing fluoride to drinking water was a popular public health measure but opposition points to a recent federal judge’s decision that ordered U.S. regulators to consider the risk that fluoride in water could cause lower IQ in kids. (AP video by Mary Conlon/AP produced by Javier Arciga)