Abstract
Groundwater samples were collected in Maheshwaram mandal, Ranga Reddy district, Telangana State, India for two seasons (pre-monsoon and post-monsoon) and analyzed for chemical parameters with respect to fluoride. The fluoride concentration ranges from 0.31 to 3.03 mg/l and 0.28–2.58 mg/l during pre-monsoon (PRM) and post-monsoon (POM) seasons respectively. Results showed that water samples were contaminated with presence of fluoride ion. High fluoride concentration recorded during PRM 62% and POM 38% when compared with World Health Organization tolerance limit of 1.5 mg/l. The higher ratio of Na/Ca indicates dissolution of fluoride minerals at higher pH and the HCO3/Ca ratio indicate the condition favoring to dissolution of fluoride ions. Hydrogeochemical facies distribution indicates water-rock interaction resulted in occurrence of high fluoride concentration in groundwater. Analytical results plotted on Gibb's diagram indicate rock and evaporation dominance. Principal component analysis indicates hydrogeochemical processes like weathering, ion exchange, and anthropogenic activities contribute to groundwater chemistry.
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