Abstract:Concentration of polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) were determined with GC-ECD in thirty surface sediment samples collected from Fenhe River in Taiyuan, while the pollution sources and ecological risk were studied. The results indicated that the total concentrations of PCBs and OCPs in sediment ranged from n.d.~50.95μg/kg and 2.19 ~25.24μg/kg, respectively. For PCBs, Aroclor1260 and Aroclor1254 were predominant isomers, which might be related to PCBs production and use of history in China. For OCPs, p,p¢-DDE were predominant congeners. Hexachlorocyclohexane (HCH) and dichlorodiphenytrichloroethanes (DDT) originated from industrial and agricultural usage. Ecological risk assessment of sediment indicated that sediments in Fenhe River were not constituted a serious threat to the ecological system, but γ-HCH, totle DDT, o,p¢+p,p¢-DDT, p,p¢-DDE, Heptachlor-exo-epoxide and totle PCBs likely to pose potential biological adverse impact.