Cauvery river is the lifeline of the population residing in Tiruchirappalli district. They are dependent on ground water as their prime source of drinking water. Hence, monitoring the quality of ground water is necessary in order to provide the public with potable water. This paper reports the physiochemical parameters of bore and well water at the site exposed to treated waste water from industries. The mean pH, TS, TDS, TSS, TH, Calcium, Alkalinity, Acidity, Total Nitrogen and Sodium and Mercury of well water exceeded the permissible limits of TNPCB. On the other hand, mean pH, TS, TDS, TSS,TH, Ca, alkalinity, acidity, Total Nitrogen and Sodium were found to be above the permissible limits of TNPCB. These could be attributed to seepage of treated industrial waste water into the ground water.
