Abstract

M. Jiban Singh, R. K. Somashekar, K. L. Prakash and K. Shivanna

In the newly developed and old parts of Bangalore city, municipal, domestic and industrial effluents are channelized into an open sewerage system. Most of the wells situated within 2 km radius of this open sewerage networks were found to be profoundly loaded with total and facal coliform. The average counts of total and facal coliform from the lake samples were 227 and 79 CFU/100 ml, 82 and 14 CFU/100 ml from the open wells and 63 and 34 CFU/100 ml from the bore wells respectively. The level of contamination is beyond the permissible limit for indicator organisms in groundwater during winter season, which can render the consumer more vulnerable to health risks.