In this research, total one hundred and sixty fishes (chalcalburnus tarichi) were used in 1994 and 1995 years. and heptachlore epoksite was only determined as organochlorine insecticides in these experiments. Hep-tachlore epoksite levels in fish meat were found as 0.0204 ppm. As a result, Van Lake and fish (chalcalburnus tarichi) was not contaminated with organochlorine insecticides, even if there are some low levels of heptachlore epoksite. This would suggest that contamination of Van Lake with organochlorine insecticides is not significant, therefore it is not life threatening.