Concentrations of polycyclic aromatic hydrocarbons(PAHs) in surface water collected from Xinxiang were determined using GC-MS. The composition characteristics of PAHs were analyzed and risks from individual PAHs and ∑PAH7 were quantified by Margin of Safety( MOS10). The results indicated that total concentrations of 15 PAHs ranged from 369—4248 ng·L-1,higher than those in other rivers of China. The profiles of PAHs showed that 3-and 4-ring PAHs was predominant,which accounted for 41. 3% and 40. 3% of the to...