An attempt has been made in this work to evaluate the environmental chemistry of groundwater in Manapparai block, Trichirappalli District, Tamil Nadu, India. Ten villages of manapparai block were selected; where the people use groundwater for drinking purpose, and the water samples were subjected to systematic analysis with a view to understand the portability of drinking water sources. The depth of the bore wells varied from 100 to 200 feet. The values obtained for different parameters were compared with the standard values given by ISI/ICMR/WHO and the variations were notable for the parameters like nitrate and total hardness for few samples. Therefore, a medical survey was carried out to study the harmful effects on the society due to these two parameters at the villages— Chitthanatham & Usilam patty.
