A total number of 46 samples were collected from the open wells during post monsoon season in and around the Tuticorin city to evaluate the water quality and scrutinize the hydro chemical characteristics. Quality assessment is done by estimating the pH, electrical conductivity, temperature, major cation (Na+, K+, Mg2+, Ca+ ) and major anions (Cl-, HCO3-, PO4-). The irrigation quality parameters like sodium absorption ratio, %Na, residual sodium carbonate, residual sodium bicarbonate, chlorinity index, permeability index and magnesium hazard were appraised.