Groundwater quality was investigated for fluoride and nitrate contamination in the mica mining areas of Jharkhand with special emphasis on seasonal fluctuation, source apportionment and human health risk assessment. Samples were collected from thirty-seven locations on a seasonal basis. The results indicated 31% and 32% samples of groundwater to exceed the Indian drinking water quality standards for F- and NO3-, respectively. Marked seasonal variation was observed in the concentration of NO3- with highest levels in monsoon season; however, the seasonal fluctuation was insignificant for F-. The NO3- contamination can be attributed to agricultural activities while F- can be related to geogenic sources. For the evaluation of non-carcinogenic risk, Hazard Quotient (HQ) and Hazard Indices (HI) were calculated as per United States Environmental Protection Agency methodology. The results suggested the child population to be most vulnerable to health risks due...

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