Concentrations of PCBs,dieldrin and DDT residues in marine animals from Liverpool Bay

The levels of DDT residues, dieldrin and PCBs have been determined in the tissues of 15 species of marine animals from the Liverpool Bay area of the Irish Sea. In general, the concentrations of these compounds are somewhat lower than those reported earlier for fish from other British inshore areas, despite the fact that the Bay is subject to pollution, not only from the River Mersey, but also from extensive sewage sludge dumping. This difference may reflect recent controls on the use of these compounds.