In May 2015, the U.S. Department of Health and Human Services, Public Health Service (PHS), revised its recommendation for community water systems that add fluoride to their water. PHS recommends a fluoride concentration of 0.7 mg/L (parts per million) to maintain caries prevention benefits and reduce the risk of dental fluorosis. This value replaces the previous recommended range of 0.7 – 1.2 mg/L issued in 1962.
The Virginia Department of Health, through the Office of Drinking Water, regulates waterworks in Virginia. For waterworks that add fluoride, the Office of Drinking Water reviews plans and specifications for fluoride feed systems and requires regular reports about the fluoride concentration in finished water. The Virginia Department of Health supports the PHS recommendation of 0.7 mg/L for optimum fluoride concentration in drinking water and will incorporate this change in future revisions to the Waterworks Regulations. 0.7 mg/L is a reduction from the optimum fluoride concentration of 0.9 mg/L that is currently recommended in Section 440 and Appendix B of the Waterworks Regulations.