| Summary: | Hydrogeological investigation have been carried out in Dantewada district. Groundwater samples were collected from selected locations in month of September 2013 and analyzed for major and minor cations & anions. Piper Diagram identified Ca-Mg-HCO3 dominantin water in most of the samples. The dominance of anions and cations were of the order of HCO3-> SO42->Cl-> NO3-> PO42- and Mg2+>Ca2+> Na+> K+.Ionic plots indicating the predominance of alkaline earth over alkali and bicarbonate is due to the reaction of the feldspar minerals with carbonic acid in the presence of water. Water chemistry is guided by complex weathering process, ion exchange along with influence of geochemical condition. Keywords: hydrochemistry, weathering, ion-exchange, water-quality
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