What is the optimal level of fluoride in drinking water?
The optimal level for fluoride is intended to prevent tooth decay and protect public health. In January 2011, the United States Department of Health and Human Services (HHS) issued a revised recommendation for the optimal level of fluoride in drinking water. Based on new research, HHS recommends a fluoride level of 0.7 mg/L as optimal for ensuring public health protection. In the past, HHS supported a fluoride level between 0.7 to 1.2 mg/L, as safe and effective in preventing tooth decay. The Environmental Protection Agency maximum standard for fluoride is 4 mg/L.
