Assessment of underground water quality based on physico-chemical parameters at Chaksu town of Rajasthan has been taken up to evaluate its suitability for domestic’s purpose. 32 ground water samples were collected from different places of Chaksu town of Jaipur district. The quality analysis has been made through the pH, EC, TDS, Dissolved Oxygen, BOD, COD, Total Hardness, Sodium, Pottassium, Calcium, Magnesium, Chloride, Sulphate, Nitrate, Fluoride and Alkanity. A systematic calculation of the correlation coffecient has also been carried out between different analysed parameters. Comparative study of samples in different seasons was conducted and it was found that Electrical Conductivity and Total Dissoved Solids (TDS) were decreased. Alkanity and Total Hardness were increased after the rainfall.