Groundwater quality plays an important role in groundwater protection and quality conservation; hence it is very much important to assess the groundwater quality not only for its present use but also a potential source of water for future consumption. The study area selected was ground water of Tuticorin District, Tamilnadu, India. In the present study an attempt has been made to identify the ground water quality of the study area in Pre monsoon (2013). The physico-chemical parameters like pH, Electrical conductivity, Total Dissolved Solid, Bicarbonate, Chloride, Sulphate, Silicate, Nitrate, Phosphate, Fluoride, Sodium, Calcium, Magnesium and Potassium were studied to analyze the potable ground water quality of the study area. Extent of pollution occurred due to seawater intrusion, salt pan contaminated, over exploitation of ground water, urbanization and anthropogenic activities. Most of the groundwater unsuitable for drinking purpose based on WHO (2004). Factor analysis indicates that seawater intrusion (Factor 1), anthropogenic contamination (Factor 2) and weathering process (Factor 3 and 4).
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