The safe- limit of fluorine in drinking water is

B. i.e. (0.5 - 0.8 mg/L) (494,586- Park 19th) (540 - Park 20th)FLUORINE - often called two - edged sword*** The recommend level of fluoride in drinking water in this country is accepted as 0.5 - 0.8 mg/L* Use of fluoride - to prevention of dental caries*** Fluorine is essential for the normal mineralization of bones and formation of dental enamel* Intemperate countries where the water intake is low, the optimum level of fluoride in drinking water is accepted as 1 - 2 mg per litre