en Assessment of Cd, Cr and Pb Pollution in Sediment and Water of Gheshlagh River, Iran, in September 2013 تخصصي Special پژوهشي Research <b>Background: </b>This study aimed to evaluate the pollution levels of surface water with heavy metals including Pb, Cd and Cr in Gheshlagh River, western Iran. <br><b>Methods:</b> Water and sediment were sampled in five monitoring stations with three replicates in time along the river. The concentration of Cr, Pb and Cd in both water and sediment samples were measured with graphite furnace atomic absorption spectrometer (Australia, Varian 220). The Geoaccumulation Index and Pollution Load Index were employed to assess the pollution level of sediments with heavy metals. <br><b>Results:</b> The mean value of Cd, Cr, Pb in sediment samples were 0.69, 17.19 and 10.69 µgg-1 per dry weight, respectively. Water samples contained Cd, Cr and Pb concentration of 1.99, 1.45 and 12.92 µgL-1, respectively. The Geoaccumulation Index and Pollution Load Index indicates that the sediments were not polluted with Pb and Cr, and unpolluted to moderately contaminated with Cd in Gheshlagh River. <br> <b>Conclusion: </b>This study concludes that the Gheshlagh River is threatened by heavy metals particularly Cd and Pb. Chemical Water Pollution, Geologic Sediments, Heavy Metals, Iran, Rivers. Chemical Water Pollution, Geologic Sediments, Heavy Metals, Iran, Rivers. 1264 1270 http://ijt.arakmu.ac.ir/browse.php?a_code=A-10-2-182&slc_lang=en&sid=1 Farshid Majnoni فرشید مجنونی 10031947532846004371 10031947532846004371 No Department of Environmental Sciences, Bojnourd Branch, Islamic Azad University, Bojnourd, Iran. Department of Environmental Sciences, Bojnourd Branch, Islamic Azad University, Bojnourd, Iran. Hossein Alipour حسین علی پور hossein.alipour@yahoo.com 10031947532846004372 10031947532846004372 Yes M.Sc of Environmental and Natural Resources Engineering, Young Researchers and Elite Club, Bojnourd Branch, Islamic Azad University, Bojnourd, Iran M.Sc of Environmental and Natural Resources Engineering, Young Researchers and Elite Club, Bojnourd Branch, Islamic Azad University, Bojnourd, Iran Mehdi Hassanpour مهدی حسن پور 10031947532846004373 10031947532846004373 No M.Sc of Environmental Protection Agency, Gorgan, Iran. M.Sc of Environmental Protection Agency, Gorgan, Iran. Gholamreza Banagar غلامرضا بناگر 10031947532846004374 10031947532846004374 No Department of Environmental Sciences, Bojnourd Branch, Islamic Azad University, Bojnourd, Iran. Department of Environmental Sciences, Bojnourd Branch, Islamic Azad University, Bojnourd, Iran. Majid Ajorlo مجید آجرلو 10031947532846004375 10031947532846004375 No Department of Rangeland and Watershed Management, University of Zabol, Zabol, Iran. Department of Rangeland and Watershed Management, University of Zabol, Zabol, Iran.