Abstract
An account is given of the enviromental impact of solid wastes used for reclaiming land in coastal areas of Penang, and of the impact of a major sewage outfall on the Western Channel. Leaching of heavy metals was shown to be one of the main sources of contamination from solid wastes. Heavy metal accumulation by the Green-lipped mussel Perna viridis L. and juveniles of the Finfish, Liza subviridis L., used to monitor the effects of the Penang ocean outfall, indicated contamination by most metals in particular Pb and Zn. The sewage outfall was also monitored for bacterial contamination and its role as a source of parasitic diseases evaluated. Recommendations for the treatment of both types of waste are discussed.
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