Groundwater quality in Kodungaiyur, Chennai district has special significance and needs great attention of all concerned since it is the major alternate source of domestic, industrial and drinking water supply. The present study monitors the groundwater quality maps using GIS techniques for a part of Kodungaiyur. Physico-chemical analysis data of the groundwater samples collected at predetermined locations forms the attribute database for the study, based on which, spatial distribution maps of major water quality parameters are prepared using curve fitting method in Arc View GIS software. GIS has been used extensively to assess the water quality all over the world, advancement of Geographical Information System (GIS) and Spatial Analysis help to integrate the laboratory analysis data with the geographic data and to model the spatial distributions of water quality parameters, most robustly and accurately. The objective of the study is to evaluate the water quality map in Kodungaiyur. For this purpose, Inverse Distance Weighed (IDW) spatial interpolation technique has been used to estimate the spatial distribution of the water quality parameters and WHO standards. The results are compared with WHO permissible limits from the point of view of the suitability of groundwater for human consumption.