Diseases due to consumption of water contaminated with microbes extract considerable morbidity and mortality. Monitoring of drinking water quality is thus of paramount importance. This study was done to assess water quality of hospital and residential water supply at our Medical Institute. Drinking water samples were collected from taps water coolers and submersible pumps and analyzed by multiple tube culture method to obtain Presumptive coliform count which is an indicator of recent faecal contamination. | Bacteriological analysis of water quality in hospital and residential water supply of a tertiary care hospital of northern India