The present study reveals ground water quality assessment of five locations of district Yamuna Nagar, Haryana, India. The quality was assessed using some physico-chemical parameters such as pH, electrical conductivity, total dissolved solids, salinity, dissolved oxygen, total hardness, calcium and magnesium hardness, total alkalinity, OH- alkalinity, CO32¯ and HCO3¯ alkalinity, Na+ and K+ concentration. The observed parameters were compared with standard values proposed by World Health Organisation (WHO) and Indian Standard (IS). The analysis shows that some parameters are found to lie beyond the permissible limits of IS and WHO limits.