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Objective: To assess and compare the concentration of heavy metals in farm and fresh water fish commonly consumed
in district Peshawar.
Material and Methods: A Cross-sectional, analytical study was conducted at community medicine department of Khyber
Medical college, Peshawar-Pakistan. Eighty Samples were selected using Non probability convenient sampling technique.
Atomic absorption spectroscopy was used for analysis of heavy metals. Data was analyzed using SPSS version 23.
Results: Out of all fishes 80(100%), there were 32(40%) fresh water fishes and 48(60%) were farm fishes. Mean lead
level in fishes was -0.0771ug/g±0.05SD. Mean Cadmium level was 0.0475ug/g±0.04SD. Mean mercury level was
8.1101ug/g±1.25SD. Mean Arsenic level was 0.166ug/g±0.112SD.Out of all fish 80(100%), Fresh water contain more
lead -0.1046±0.05SD as compare to farm fish -0.0587±0.593SD (P=0.000) Mean cadmium level in farm fish was
0.0509±0.06SD. while mean cadmium level in fresh water fish was 0.0425±0.097SD (P=0.441).Out of all fishes 40(100%),
Fresh water fish contain high mercury 8.46712±0.739SD as compare to WHO standard and approximately similar values
are reported in farm fishes 7.87220±1.472SD (p=0.000). Farm fish contain high level of arsenic 0.21275±0.110SD as
compare to fresh fish 0.09668±0.07SD (p=0.001)
Conclusion: High level of mercury and arsenic are found in this study. However, concentration of mercury is above
WHO defined limits as compare to other metals in all samples.
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