The U.S. Environmental Protection Agency has taken a major step toward determining whether the fluoride added to most Americans’ tap water poses a danger to children’s developing brains, announcing a new scientific protocol that will examine links between fluoride exposure and reduced IQ. The move comes as mounting research—including studies funded by the National Institutes of Health and a landmark federal court ruling—has forced regulators to accelerate a review originally not due until 2030.
EPA Administrator Lee Zeldin announced the release of the Protocol for Developing the Fluoride Human Health Toxicity Assessment on August 3, calling it a milestone in the agency’s expedited review under the Safe Drinking Water Act.
“Every American should be able to count on safe and healthy drinking water, plain and simple,” Zeldin said. “In light of new science and real concerns from the public, the Trump EPA is working in lockstep with HHS to expedite our review of fluoride under the Safe Drinking Water Act.”
What the protocol covers
The new protocol lays out how the agency will conduct a dose-response analysis to pin down what levels of fluoride exposure cause harm. The review will look specifically at children’s brain development, including effects on IQ, along with dental fluorosis — the staining and pitting of tooth enamel linked to fluoride overexposure.
Health and Human Services Secretary Robert F. Kennedy Jr. framed the review as a matter of parental rights and scientific transparency.
“Parents deserve the truth about fluoride in drinking water—not assumptions, not politics, but rigorous science,” Kennedy said. “That is why HHS is working side by side with EPA to ensure this assessment focuses on the health risks that matter most for children, including neurodevelopmental effects and dental fluorosis. By conducting a rigorous dose-response analysis and making every step of the process transparent, we will give states, communities, and families the scientific foundation they need to make informed decisions about fluoride in drinking water.”
Hellbound and Down 