Comparison of Bio-Contamination Level of Source and Sink Waterin Hyderabad and Tando Allahyar, Sindh Pakistan

This study was carried out to compare the level of bio-contamination between source and sink water from 11 different water supply schemes of Hyderabad and Tando Allahyar. 3 samples from each scheme were collected (untreated source water, treated source water and sink water). The average water contamination in source water (untreated) was 91.81 (n=26), source water (treated) 52.27 (n=10) and sink water (home) was 74.54 (n=20) against the microbial growth of 15 (n=03) in the control water samples (Nestle). Percentage of microbial agents that was E. coli, fecal streptococci and Salmonella were 100 (n=11),, 73 (n=08) and 64 (n=07) in untreated source water respectively. After treatment, the level of contamination was reduced to 45 (n=05), 18 (n=02), and 27 (n=03) of E. coli, Fecal streptococci and Salmonella respectively. However microbial growth was increased at end users (sink water) as 100 (n=11), 45(n=05) and 36 (n=04) of E. coli, fecal streptococci and Salmonella respectively. Water supply schemes under investigation were found to be highly contaminated with microbial organisms (E. coli 82 (n=27), fecal streptococci 45 (n=15) and Salmonella 42 (n=14). We conclude from our studies that rare treatment of source water does not provide clean water supply to the end users therefore it is recommended that the drinking water must be subjected to various techniques (chlorination, fluorination, aeration and boiling of water).©

کلیدواژه ها:

Hyderabad ، Microbial Growth ، Sink Water ، Source Water ، Tando Allahyar