Abstract
Residue of PCB, DDT and HCH in several kinds of fish and shellfish from lakes and rivers in Japan was reviewed from the middle of 1970s to that of 1990s. There were differences among lakes (Lake Suwa, Lake Kasumigaura, Lake Shinji and Lake Biwa) or among rivers (Ado River, Kitakami River, Chikuma River or Toyohira River) in the concentrations of these chemicals, in the percentages of DDT and DDT metabolites in T-DDT and in the composition of HCH isomers.
