Abstract: The status of pollutant characters related to environmental toxicology in main estuaries and coastal zones of Bohai Bay were investigated in 2000. It was shown that the environmental quality of some water and sediments belongs to middle-high level pollution in the estuary water environment. The pollution of some heavy metal elements and organic pollutants is serious compared with that of environmental criterion in some sampling sites. For instance, in some estuary sites of the Haihe River, the Liaohe River and the Huanghe River, the contents of chromium, cadmium, nickel, mercury, arsenic and lead etc. exceed by several times compared with the criterion. There are more than 200 organic compounds being detected, which mainly come from industrial emission and drainage.