Abstract: The present study was carried out the physicochemical characteristics of basaltic and granitic aquifers of Dharmabad Taluka of Nanded District, Maharashtra (India). The water samples collected from different regions of basaltic and granitic aquifers of Dharmabad during 2007 in pre monsoon season. The physico-chemical parameters such as pH, EC, total dissolved solids, hardness, alkalinity as well as chloride, sulphate, nitrates, sodium, potassium and fluoride have been analyzed. The analytical results indicated considerable variations among the analyzed samples with respect to their chemical composition. The observed values of various physico-chemical parameters of water samples were compared with standard values recommended by BIS (Bureau of Indian Standards). Majority of the samples do not comply with BIS for most of the water quality parameters measured. The fluoride concentration in the underground water of these villages varied from 0.1 to 1.17 mg/l, causing dental fluorosis among people especially children of these villages. The nitrates concentration varied from 12 -178 mg/l. Overall water quality was found unsatisfactory for drinking purposes without any prior treatment in maximum samples.