Lakes, the vigorous water filled inland aquatic systems, perform variety of functions like provide potable, irrigation and water for industrial use, sink for waste disposal, fisheries and recreation resource etc. are subject to contamination due to various natural and anthropogenic disturbances and all these turbulences in their water quality can be assessed by calculating WQI to judge the purpose for which the current water can be sagely used for. In the present study, the water quality assessment of three lakes of Haryana viz; Tikkar Taal, Karan Lake and Brahma Sarovar was carried out by assessing water with the help of 10 physico-chemical parameters to calculate the water quality index of each lake. 4 parameters (DO, BOD, Iron and EC) were found beyond the permissible limits when compared with standards given by ICMR/BIS. WQI results revealed that water quality of each lake is presently in extremely poor condition.
