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Water fluoridation in the United States is common amongst most states. As of May 2000, 42 of the 50 largest U.S. cities had water fluoridation. On January 25, 1945, Grand Rapids, Michigan, became the first community in the United States to fluoridate its drinking water for the intended purpose of helping to prevent tooth decay.
Water fluoridation reduces cavities in children, while efficacy in adults is less clear. [9] [needs update] [10] [11] A Cochrane review estimates that when water fluoridation is used by children who have no other access to sources of fluoride, there is a reduction in cavities by 35% in baby teeth and 26% in permanent teeth. [9]
Fluoride pollution from various industrial emissions can also contaminate water supplies. In a few areas of the United States, fluoride concentrations in water are much higher than normal, mostly from natural sources. In 1986, EPA established a maximum allowable concentration for fluoride in drinking water of 4 milligrams per liter (mg/L).
Kentucky is the only state to require fluoridation in every community water system that serves 1,500 or more people, and as a result, 99.99 percent of residents receive fluoridated water.
Studies have validated fluoride’s benefits at low levels, but newer research shows risks.
Water fluoridation is used in the United States, United Kingdom, Ireland, Canada, Australia, Israel, Hong Kong and a handful of other countries. Most countries failed to adopt fluoridation, yet experienced the same or greater decline in cavities as those countries that did fluoridate during the later half of the twentieth century. [77]
Supporters of the bill say fluoridating water does not help protect teeth and could lead to lower IQs in kids. Dentists pushed back on those claims Kentucky lawmakers ignore dentists, could let ...
Defluoridation is the downward adjustment of the level of fluoride in drinking water. Worldwide, fluoride is one of the most abundant anions present in groundwater. Fluoride is more present in groundwater than surface water mainly due to the leaching of minerals. Groundwater accounts for 98 percent of the earth's potable water. [1]