Integrating the geoelectrical parameters with hydro-geochemical parameters of existing wells, the hydraulic conductivity, transmissivity and porosity of hard rock basaltic aquifers in a part of the semi-arid southeastern region of Maharashtra were estimated. The hydraulic conductivity values were computed using the Kozeny-Carman-Bear (KCB) equation. The spatial variation of aquifer parameters was determined using the ordinary kriging technique. The results suggest that a number of isolated pockets of the study area reveal relatively high value of hydraulic conductivity, porosity and transmissivity. The hydraulic conductivity decreases with increasing bulk electrical resistivity due to possible presence of basaltic rock while, the increase of hydraulic conductivity with decrease of bulk electrical resistivity is presumably due to the good fracture network connectivity in crystalline hard rock. The transmissivity values at certain locations divulge high values (> 380 m(2)/day), which are likely due to the water-saturated fractured medium. The derived transmissivity values are in good agreement with those obtained from well performance data of Central Ground Water Board (CGWB). These zones also have relatively high aquifer thickness and thus represent high potential regions within the water-bearing formations. The spatial variation map of transmissivity reveals a positive relationship with hydraulic conductivity at north-east, southern and western parts of the study area. These findings indicate that such studies would be useful in characterizing the aquifer system over different semi-arid, trap covered regions of India, including Maharashtra.