Soil samples of different soil types under different land use patterns and environmental impacts were collected in Wuxian City in the Taihu Lake region. The contents of SAS were determined by Azure A colorimeter. Degradation of LAS was studied in the water and soil mediums by using laboratory incubation. The SAS concentration in the studied soils ranged from 2 to 10 mg.kg-1, varied with soil conditions. Profile distribution of SAS showed decreasing trend down to the soil bottom, where 0.7 mg.kg-1 of SAS was still detected. The degradation of LAS in three dominant types of paddy soils obeyed the primary reaction equation like that of soil organic matter with the half residence time in range of 9-16 days. The data indicates the relative accumulation of SAS in the soils in the Taihu Lake region and longer residence of such synthetic organic compounds in the soil environments.