Contamination of aquatic systems with pesticides occurs frequently. This study aimed to detect the levels of some pesticides: organochlorines, organophosphorus, pyrethroids, and carbamates groups in imported frozen and local fresh fish in Jordan. A total of 218 samples were randomly collected (194 imported frozen fish). Samples were analyzed using Liquid Chromatography with Tandem Mass Spectrometry (LC/Ms/Ms). Results showed that 23 different pesticides were found in this study. All 218 fish samples were contaminated with at least 4 compounds and maximally 12 pesticides. In terms of contamination rate, no significant differences between local and imported types were observed. Up to 65.2% of pesticides were detected at concentration higher than the maximum residue limit set by the WHO (10 ppb) in 215 samples (98.6%). These samples concluded heavy contaminations with different pesticides for either imported or locally raised products. Therefore, routine monitoring of pesticides in fish and their environment are officially required.
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