The purpose of this study is to determine the amounts of the various polycyclic aromatic hydrocarbons (PCAHs) in Lake Temsah, Ismailia governtrate , Egypt, 200 Tilapia zillii fishes and six water samples that were seasonally and randomly obtained from various locations throughout the lake were examined in the study. According to our findings, 16 different kinds of poly cyclic aromatic hydrocarbons (PCAHs) were found in both the fish tissues(Musculature and liver) and the water samples. The most prevalent PCAH in the water samples was determined to be pyrene, where as the least abundant PCAH in the fish muscle was found to be benzo (ghi). According to Liver, Acenaphthylene hydrocarbon was the lowest and Pyrene was the highest.Tilapia zillii fish liver had the higher overall mean amounts of carcinogenic PCAHs than that in fish tissues and water samples.
Key words: Tilapia zillii fish ,Polycyclic aromatic hydrocarbon (PCAHs), dendogram, fish tissues, pollution,carcinogenic.