Costal wates and transitional waters are more sensitive than others to the consequences of domestic and insdustrial discharges. Five miles north of Vlora, by the seashore, there is the site of a former chemical complex that used to produce chlorine alkali, vinyl cloride monomer and polyvinyl chloride. While the plant was s closed in 1992 it still poses a threat to the environment due to the high lelvel of environmentally contamination with mercury deriving from former chlorine-alkali electrolysis processes that used metallic mercury. The aim of this project is to carryout studies and to publish all results of the studies in this site regarding the environmental problem and the level of risk in the polluted area. Determination of the level of the pollution as well as the specification of the form of the mercury in polluted area will help on defining the cleaning technology.