Studies have established that fluoride is associated with a reduction in the IQ of children and is hazardous at dosages that are far too close to fluoride levels in the drinking water of the United States.

Credits: envato elements; Author: @Wavebreakmedia;

The ruling did not specify what measures must be adopted by the EPA, but under the Toxic Substances Control Act, once the court rules that a chemical poses a risk, the EPA is obligated by law to restrict or eliminate the risk.