What is considered an acceptable level of fluoride in drinking water?

The acceptable level of fluoride in drinking water is 1.0 mg/L. This concentration is based on guidelines established to balance the benefits of fluoride in preventing dental cavities with the potential risks associated with higher concentrations, such as dental fluorosis or other health concerns.

Fluoride is beneficial at low levels, especially for children, as it helps strengthen tooth enamel and prevent cavities. Public health standards support maintaining this optimal level to ensure the population receives those dental health benefits without exposing them to the risks associated with higher fluoride concentrations. The upper limit set at 4.0 mg/L relates to a level at which adverse health effects may begin to be observed, thus indicating that any concentrations above the optimal level should be carefully monitored.