REVIEW ON PERFORMANCE EVALUATION OF WATER TREATMENT PLANT AND WATER QUALITY INDEX

Human body contains about 60 % of water and water is being used in most of human activities in different ways. Therefore it is observed that early human civilization had spread along the river banks. The degradation of water quality in water body creates adverse condition so that water cannot be used various purposes including bathing, recreation and as a source of raw water supply. According to Central Pollution Control Board (2008), out of total water supplied to the town and cities in India, 90% is polluted, and out of which only 1.6% gets treated. Therefore, water quality management is fundamental for the human welfare. Safe water supply is required in adequate quantity at convenient points and at reasonable cost to the consumers. Therefore performance of water treatment plants needed to be evaluated and monitored by analysis of various physico-chemical and bacteriological parameters (IS: 10500- 2012). A water quality index is a numerical value which is developed to interpret overall water quality as well as to identify water pollutants at certain location and time, based on several water quality parameters.The present paper is reviewed for water quality Index from 2007 to 2013 and for water treatment plant performance evaluation from 2003 to 2014.