Water Fluoridation in the United States
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As with some other countries water fluoridation in the United States is a contentious issue. As of May 2000, 42 of the 50 largest U.S. cities had water fluoridation.Fluoridation became an official policy of the U.S. Public Health Service by 1951, and by 1960 water fluoridation had become widely used in the U.S., reaching about 50 million people. By 2006, 69.2% of the U.S. population on public water systems were receiving fluoridated water, amounting to 61.5% of the total U.S. population; 3.0% of the population on public water systems were receiving naturally occurring fluoride.

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As with some other countries water fluoridation in the United States is a contentious issue. As of May 2000, 42 of the 50 largest U.S. cities had water fluoridation.Fluoridation became an official policy of the U.S. Public Health Service by 1951, and by 1960 water fluoridation had become widely used in the U.S., reaching about 50 million people. By 2006, 69.2% of the U.S. population on public water systems were receiving fluoridated water, amounting to 61.5% of the total U.S. population; 3.0% of the population on public water systems were receiving naturally occurring fluoride.