Hydrgeochemical Studies of Major Fluoride

The Peninsular region where it is represented by Archaean Granites and Gneisses and occasionally schists and veins of pegmatite quartz and epidote. The area is a chronic fluoride zone causing Fluorosis since the rocks having the fluoride and fluorine bearing minerals. Keeping in view.The studies on role of Geo-environment in health problems/hazards was initiated three decades ago but no substantial work was carried out so far since it require inter-disciplinary studies. It is high time to investigate to understand and to establish the role of geo-environmental hazards on health issues. It has to be addressed to high light the health hazards related pollution by the effluents from industries mines fertilizers and pesticides besides natural/geological causes It is well known higher exposures in many tropical lands where Fluoride Lead Arsenic Mercury and other heavy metals is found in excessive quantities in the drinking water have had devastating effects.As in the case of some essential trace elements the optimal level of fluoride varies within a narrow range. In locations where the exposure to fluoride is not well controlled including Nalgonda district many people suffer