Question: Defluoridation is the downward adjustment ot the level of fluoride in drinking water Worldwide, fluoride is one ot the most abundant anions present in

water Worldwide, fluoride is one ot the most abundant anions present in

Defluoridation is the downward adjustment ot the level of fluoride in drinking water Worldwide, fluoride is one ot the most abundant anions present in groundwater. Fluoride is more present in groundwater than surface water mainly due to the leaching ot minerals. Groundwater accounts for 98 percent of the earth's potable water.[ll An excess ot fluoride in drinking water causes dental fluorosis and skeletal fluorosis. The World Health Organization nas recommended a guideline value ot 1.5 mg/L as the concentration above which dental fluorosis is likely.[21 Fluorosis is endemic in more than 20 developed and developing nations]'

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