Bacteriological analysis of groundwater of karachi

The level of microbial contamination in open wells in selected areas of the Karachi city was studied in consideration of the health of the inhabitants of the areas. A total of 115 well water samples were collected and examined for total bacterial count and counts of coliform, faecal coliform and Pseudomonas aeruginosa. The microbiological analysis yielded presence of coliform and faecal coliform in 66.63% and 60.89% of the samples examined, respectively, while Pseudomonas aeruginosa was detected in 30% of the ground water samples. 84.34% of the water samples were found unsatisfactory as per WHO standards. (author)