The main objective of this study is to analyze the quality of various physical and chemical parameters of ground water from a well, which is selected as a source of water supply for QIS Educational Institutions, Ongole, Andhra Pradesh. So, it is necessary to assess the quality of water of the source. For this assessment, a sample of water was collected and analyzed at the Environmental Engineering lab at QISIT. The quality of the sample estimated with various important physicochemical parameters like acidity, alkalinity, pH, chlorides concentration, hardness, total solids, Dissolved Oxygen, Electrical Conductivity, temperature and fluorides concentration during pre-monsoon and post monsoon periods. The results were compared with WHO and IS recommendations of drinking water standards and then concluded that the water is safe for drinking during the periods post-monsoon and pre-monsoon.