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Hydrogeochemical investigations carried out in parts of granitic tracts of Telangana region of India revealed that the fluoride concentrations in the groundwater are much higher than the prescribed limit (>1.5mg/l). It is observed that fluorine bearing minerals like fluorite and apatite present in granitic rocks are the major source for the excessive fluoride in groundwater. Geology of the area and climatic conditions play vital role for the high concentrations of fluoride in groundwater. In addition, depletion of groundwater levels due to climatic changes is another factor for high incidence of fluorosis.
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