<p><span style="font-size:14px"><span style="font-family:Arial,Helvetica,sans-serif">Upper lake is major source of water for Bhopal city, but over the years, the quality of lake water has deteriorated due to inflows of waste and sewage. The present study was undertaken to characterize the physico-chemical parameters of water samples from Prempura site of the Upper Lake in Bhopal city during summer season (2005). Evaluation of physico-chemical parameters was carried out. To assess the quality of water, each parameter was compared with the standard desirable limit of that parameter in drinking water as prescribed by different agencies. A systematic calculation was made to determine the correlation coefficient &lsquo;r&rsquo; amongst the parameters and the strength of relationship is measured by the coefficient of determination &lsquo;r2&rsquo;. Then these values were interpreted in terms of interdependence of water quality parameters on each other.</span></span></p>