In order to investigate the distribution characteristics and ecological risk of HCHs and DDTs in the surface water of Xinxiang,18 surface water samples were collected from from Xinxiang and the concentrations of HCHs and DDTs were determined. The ecological risk of HCHs and DDTs was evaluated using the overlapping areas of probability density function and safety threshold methods. The results showed that the levels of total HCHs( Σ HCHs) and total DDTs( Σ DDTs) in 18 samples detected by GCECD ranged from 1....