On January 7, 2011, the U.S. Department of Health and Human Services announced that it is recommending that water treatment plants provide 0.7 mg/L of fluoride in public drinking water supplies. The current recommended range is 0.7 to 1.2 mg/L. In 2006, the U.S. EPA requested that the National Academies of Science review new data on the affects of fluoride. The National Academies of Science recommended that the U.S. EPA update its health and exposure assessments and consider the effects of fluoride on bone and dental health while considering all the sources of fluoride. The Department of Health and Human Services plans to release final guidance on fluoridation in the spring of 2011.

In Ohio, Ohio Rev. Code § 6109.20 requires communities larger than 5,000 to keep fluoride levels in the range of 0.8 - 1.3 mg/L. Initially, thirty Ohio communities are exempt from the fluoride requirement; however, seven of those communities have since started using fluoride. For more information on scientific assessments and actions on fluoride, see the U.S. Department of Health and Human Services available at: http://www.hhs.gov/news/press/2011pres/01/20110107a.html.