Distribution of HCHs and DDTs in Agricultural Soil of Pudong New Area, Shanghai

To study HCHs and DDTs contents and their spatial distribution in the agricultural soil of Pudong, Shanghai, the residue amounts of HCHs and DDTs in 238 surface soil samples were determined. The results showed that concentrations of HCHs ranged from 0.001 to 0.050 mg/kg and DDTs ranged from 0.001 to 0.067 mg/kg, with both occurrences of 100%. The spatial analysis indicated that there was the obvious regional differentiation in soil pollution. Compared with HCHs, soil quality was contaminated more seriously by DDTs in the study area. In addition, areas with high contents of HCHs were mainly located in Jichang, Chuansha and Sanlin, whereas areas with high concentrations of DDTs mainly lied in Sanlin, Jichang, Tang, Chuansha and Caolu.