The physico-chemical characteristics of groundwater samples from selected bore wells in Greater Visakhapatnam Municipal Corporation (GVMC) area have been studied. A total of 50 samples were collected in the month of May during the year 2005.

In the present study analysis of fluoride content in ground water and surface water of Bhopal region was done. 15 samples were taken from different sampling stations of Bhopal and nearby villages.

Fluoride contamination study has been carried out in Uravakonda mandal of Anantapur district, Andhra Pradesh.

The chemical quality of ground water in two tehsils of Satna, that is Sohawal and Majhgawan was studied based on the analysis of 22 water samples. The higher values of certain parameters at certain locations indicate the contamination in groundwater and make the water unsuitable for various applications.

The present investigation was carried out to find the ground water quality at 20 different localities in and around Sivakasi town, Viudhunagar district, Tamil Nadu. Various physico-chemical parameters, such as temperature, pH, electrical conductivity, total hardness, temporary hardness, permanent hardness, total dissolved solids, total alkalinity, chloride, sulphate through the water analysis.

Studies on the bacteriological quality of groundwater samples around the sewage farm in Muttathara-Valiathura area of Thiruvanathapuram district, Kerala was conducted during post-monsoon (November 2007) and pre-monsoon (April 2008) seasons.

The physico-chemical and bacteriological characteristics of ground water samples collected in Dharmapuram village, Kanyakumari district, Tamil Nadu was assessed.

Varada river basin of Shivamogga district, Karnataka is the study area for groundwater quality mapping using the Geographic Information System (GIS).