摘要：The groundwater quality from the watersheds PGK1, PGK3 and PGK4, Yavatmal District (Maharashtra),Central India, has been assessed and results are presented in the paper. Fifty samples collected fromdeeper aquifers have been analysed for various parameters like pH, EC, TDS, Ca ++ , Mg ++ , Na + , K + , HCO 3 - ,CO 3 -2 , Cl - , SO 4 -2 , and F - . The interrelationship between F - with pH, Na + , SO 4 -2 , and Cl - has resulted intopositive correlation, while inverse relationship is noted for Ca ++ and HCO 3 - . In the area of study, the F -content ranges from 0.2 to 15.6 mg/L, and 64% of groundwater samples from deeper aquifer have F -concentration more than 1.0 mg/L. The higher concentration of F - in Neoproterozoic limestones has beenascribed to the presence of fluoride bearing minerals like fluorite and apatite. In such limestones of chemicalorigin, co-precipitation of CaF 2 and CaCO 3 is the major process which controls the fluorine distribution in therocks. The leaching of F - containing minerals from the weathered zone to deeper depth has contributed thehigh F - concentration in basaltic aquifers. Amongst the analysed samples, 58% of groundwater is suitablefor irrigation.
