There are 252 toxic chemicals in the revised Toxic Substances Control Act (TSCA) promulgated by Taiwan EPA. The purpose of this project is to establish a practical and appropriate toxic data as the basis of further related policy-making and policy-executing. Three approaches would be applied to accommodate this goal. The first was to conduct field studies and empirical measurements in sediments and fishes of the 7 rivers to explore the concentrations and distribution for those selected chemicals, including chlordane, epichlorohydrin, mercury, organotin compounds (OTCs), polybrominated diphenyl ethers (PBDEs) and phthalates (PAEs). The secondd was to collect and analyze the results of survey report sponsored by research institutes and governmental institutes in the past ten years in Taiwan, combining with the data of spatial and temporal distributions, the concentration and allocation profile in various environmental media and humans can be elucidated for these toxic chemicals. In this research, about the environmental fate of the toxic chemical compounds in sediments and fishes of the 7 rivers, we finished the sampling and analysis work of 1,061 samples. We got 355 literatures about the chemical compounds, through the collection and the analysis of survey report sponsored by research institutes and governmental institutes in the past ten years in Taiwan, combining with the data of spatial and temporal distributions, the concentration and allocation profile in various environmental media and humans were elucidated for these toxic chemicals.

toxic chemicals environmental fate,river,sediment,fish,chlordane,epichlorohydrin,mercury,organotin compounds,polybrominated diphenyl ethers,phthalates