Yes. In early 2011, the EPA revised these guidelines, as well as rethinking the acceptable amount of fluoride allowed in drinking water. The main concern was maintaining high enough levels of fluoride in water to help prevent tooth decay for the populace overall, with potential dangerous effects associated with the intake of too much fluoride. The EPA said that Americans typically have many other sources of fluoride since water fluoridization began in the 1940’s. Today many Americans get fluoride from toothpase or other dental products. The new recommendation is about 0.7 mg per liter of water.
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