WATER QUALITY ASSESSMENT OF NAINITAL LAKE BY NUMERICAL INDICESAJAY KUMAR SINGH, VARSHA, AMIT MITTAL, SATISH KUMAR AND PRATUL RAJ
Nainital Lake forms the nub of the beauty of Nainital, with its water emulating the mesmerizing colours of the surrounding green hills. In the past few years, it has been observed that Nainital fascinating a huge number of foreign and domestic tourists making it one of the most favoured tourist place which has led the lake to a state of misery. Moreover, Nainital Lake is the major source of drinking for the local population. Thus, the current work aims to examine the quality of water via the two indices: Canadian Council of Ministers of the Environment Water Quality Index (CCMEWQI) and National Sanitation Foundation Water Quality Index (NSFWQI) on the basis of various physiochemical water parameters like (Turbidity, DO, Electrical conductivity, BOD, TSS etc.). The samples were collected during the months of January to May 2018 at an interval of 15 days. On calculation of the water quality index using numerical indices it was found that the quality of water is âfairâ by CCMEWQI and âmediumâ by NSFWQI. Also, it has been observed that quality of water was deteriorated in the month of April and May due to heavy tourist influx. Therefore, it is suggested that before using the water for drinking purpose prior treatment of lake water is required.