Safety of Water Fluoridation

A subcommittee of the National Research Council's (NRC) Committee on Toxicology (COT) reviewed toxicologic, epidemiologic, and clinical data, particularly data published since 1993, and exposure data on orally ingested fluoride from drinking water and other sources (e.g., food, toothpaste, dental rinses).
The purpose of this report is to provide recommendations to the Environmental Protection Agency (EPA) on whether the current maximum contaminant level goal (MCLG) of 4 mg/L protects children and others from adverse health effects.
The NRC committee did not examine health risks or benefits of water at the levels recommended for fluoridation of water to prevent tooth decay.
The current range for water fluoridation of community water systems is 0.7 to 1.2 ppm (equivalent to 0.7-1.2 mg/L).
Water that has fluoride at these levels is safe and effective for preventing tooth decay.
http://www.cdc.gov/fluoridation/safety/nrc_report.htm

The purpose of this report is to provide recommendations to the Environmental Protection Agency (EPA) on whether the current maximum contaminant level goal (MCLG) of 4 mg/L protects children and others from adverse health effects.