ASSESSMENT OF WATER QUALITY

Abstract

Potable water when passes through the distribution system deteriorates in its microbial quality. Further the quality of water deteriorates as it is stored in sump tanks, overhead tanks and loft tanks. Since the tanks are not regularly cleaned the quality of water is affected as it reaches the end user. Due to irregular and improper cleaning of the tanks there is an accumulation of organic matter in the tanks due to which the different microorganisms grow in water which leads to spread of various diseases. In this study different sampling sites from Navi Mumbai have been selected which are tested for free residual chlorine and microbial contamination. Study indicates that there is successive increase in the microbial contamination as water passes from sump tank to overhead tank. Maximum contamination is observed in case of water stored in loft tanks. Disinfection of tank can prove to be one of the measures to check the increase in MPN values in water.