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The current assessment aimed to evaluate physico-chemical, metal and microbiological characteristics along with Water Quality Index (WQI) of tanker water (12 samples) which were collected during 2018 from Karachi city. The water samples were investigated for pH, Turbidity, TDS (Total dissolved solids), Chloride, Hardness (as CaCO3 ), Alkalinity, Nitrate, Phosphate and Sulphate. These parameters were well within the guidelines prescribed by WHO (2011) and NSDWQ (2008) with the exception of TDS, Hardness and Sulphate. The mean concentration of examined metals (As, Pb, Cr, Ni, Ca, Mg, Fe and Zn) were in the order of Ca > Mg > Zn > Pb > Ni > Fe > As > Cr in all the samples. Most Probable Numbers (MPN) Technique was used to find Total Coliform Count (TCC), Total Fecal Coliform Count (TFC) and Total Fecal Streptococci (TFS) for microbial assessment. Presence or absence of Escherichia coli was also monitored through florocult media. Seventy five percent samples were faecally contaminated and failed to meet the guidelines set by WHO and NSDWQ. According to WQI results, 91.6 % samples were found to be good with respect to physico-chemical properties. In terms of metals, WQI value of all the samples revealed unfit for human use. Possible contamination sources are unhygienic condition of water tankers and delivery pipes, untreated sewage discharge, cross contamination, agricultural runoff, human and animal waste which may cause disease associated with public health. Water monitoring plans of water management and awareness programs of innocuous waste dumping have been recommended.
Aamir Alamgir, Moazzam Ali Khan, Talha Iftikhar , Syed Shahid Shaukat. (2021) PUBLIC HEALTH ASSESSMENT AND WATER QUALITY INDEX OF TANKER WATER AVAILABLE IN KARACHI CITY, , Volume 18, Issue 2.
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