This paper is aimed to delineate the groundwater potential zone in and around Tiruttani block, Tamil Nadu, India. The study area is located in hardrock terrain. The surface parameters such as geology, geomorphology, soil, slope, land use/cover, drainage and lineament have taken for the study. The thematic maps of the above said parameters were produced using geospatial technologies. The Super Decision Making software that specially designed to execute the Analytical Networking Process have for the Groundwater Potential zone mapping. ANP has run for the surface parameters and the groundwater potential map has derived for the study area. In the study area 210.92 sq.km of the area was classified to have high groundwater potential zone, 341.2 sq.km of the area was classified as moderate groundwater potential zone and 423.84 sq.km of the area is of low groundwater potential zone.
