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As of May 2000, 42 of the 50 largest U.S. cities had water fluoridation. [29] According to a 2002 study, [30] 67% of U.S. residents were living in communities with fluoridated water at that time. The U.S. Centers for Disease Control has identified community water fluoridation as one of ten great public health achievements of the 20th century. [31]
Water fluoridation is the controlled addition of fluoride to a public water supply to reduce tooth decay, and is handled differently by countries across the world [2].. Water fluoridation is considered very common in the United States, Canada, Ireland, Chile and Australia where over 50% of the population drinks fluoridated water.
The effect of water fluoridation on the natural environment has been investigated, and no adverse effects have been established. Issues studied have included fluoride concentrations in groundwater and downstream rivers; lawns, gardens, and plants; consumption of plants grown in fluoridated water; air emissions; and equipment noise. [54]
Here's the complete history of fluoridated water. Too much fluoride can make your teeth brown, but getting a little bit is a dentist's dream. Here's the complete history of fluoridated water.
Studies have validated fluoride’s benefits at low levels, but newer research shows risks.
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.
It can also increase the risk of bone fractures. The report concluded unanimously that the present maximum contaminant level goal of 4 mg/L for fluoride should be lowered. [45] Several states have more stringent regulations. For example, the fluoride MCL for public water systems in New York (state) is 2.2 mg/L. [46]
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]