In developing country like India landfills are situated near to cities, releasing harmful contaminants which percolate to the groundwater. This results in contamination of the ground water. Municipal wastes and hazardous wastes are the main cause of polluting the ground water. The Chennai Corporation has two major dumping sites namely Perungudi and Kodungayaiyur located south and north of Chennai. These open dumpsites are smelly and surface water percolating through the trash can dissolve or release harmful chemicals, among these chemicals, heavy metals causes environmental problem. Heavy metals when gets dissolved in ground water which then consumed by humans leads to health issues, Hence the presence of bore wells and tube wells near the dumpsite threatens the life of people living near that area. In this study an attempt was made to know the concentration of heavy metals in ground water around the Perungudi dumpsite. For this study 10 number of ground water samples were collected and preserved by adding of 2-3 drops of nitric acid. The samples were subjected to analysis of pH, TDS, hardness, COD and four trace metals Cr, Cu, Cd and Fe by using inductively coupled plasma mass spectrometry (ICP-MS). It was observed that the health of the people residing near the dumpsite was affected due to consumption of this water. It is concluded that the ground water is contaminated and cannot be used for drinking water as well as domestic purpose.