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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. [2] 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]
Public water fluoridation was first practiced in the U.S. [21] As of 2012, 25 countries practiced artificial water fluoridation, with 11 covering over 50% of their population. About 435 million people globally (5.4% of the population), including 211 million in the US (75% of the population), received fluoridated water at recommended levels.
Water fluoridation levels are set at a national standard of 1 mg/L, with higher levels for rural areas at 1.2 mg/L. [33] Water fluoridation began in 1965 in the urban area of Guangzhou. It was interrupted during 1976–1978 due to the shortage of sodium silico-fluoride.
In 1945, Grand Rapids, Michigan became the first U.S. city to start adding fluoride to tap water. In 1950, federal officials endorsed water fluoridation to prevent tooth decay, and continued to ...
The reason most Americans have fluoride in their drinking water stretches back more than a century to a mysterious outbreak scattered across the Midwest and western US.. In the early 1900s ...
Some U.S. communities began doing so in the 1940s, and today about 72% of the U.S. population that receives water from public utilities drinks fluoridated water, according to the CDC.
U.S. opponents of fluoridation were heartened by a 2006 National Research Council report about hazards of water naturally fluoridated to high levels; [48] the report recommended lowering the U.S. maximum limit of 4 mg/L for fluoride in drinking water. The EPA did not act on that recommendation. [101]
Water fluoridation is not mandatory, and while there is a recommended fluoride concentration in drinking water (0.7 milligrams per liter) from the CDC, that level is not an enforceable standard.