15Various physico-chemical parameters including fluoride (F -) were analyzed to 16 understand the hydro geochemistry of an aquifer in a semi-arid region of India. 17Furthermore, the quality of the shallow and deep aquifer (using tube-well and hand-18 pumps) were also investigated for their best ecological use including drinking, 19 domestic, agricultural and other activities. Different multivariate techniques were 20 applied to understand the groundwater chemistry of aquifer. Findings of correlation 21 matrix were strengthened by the factor analysis and this shows that salinity is mainly 22 contributed by magnesium-salts as compared to calcium-salts in the aquifer. The 23 problem of salinization seems mainly compounded by the contamination of the shallow 24 aquifers by the recharging water. High factor loading of total alkalinity and bicarbonates 25 indicates that total alkalinity was mainly due to carbonates and bicarbonates of sodium. 26

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