OCCURRENCE OF FLUORIDE IN GROUND WATER AND GROUND WATER QUALITY IN RURAL AREA OF TIRUNELVELI DISTRICTD. SANTHIAbstract Fluoride concentration in ground water and ground water quality parameters in ground water samples from three villages of Tirunelveli District were assessed. It is found that fluoride concentration in ground water is heterogeneously distributed and more than 1 ppm, which is much above the permissible limits prescribed by ICMR. Fluoride content upto 1 ppm is considered as safe and fluoride beyond that limit leads to dental and skeletal fluorosis.
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