Over decades, Sweden's coast and harbour areas have been contaminated from shipping, watercourses and air. The contamination which often occurs in harbour areas consists, for example, of heavy metals, TBT (tributyltin) and PCB. The need to dredge in Sweden and in our Nordic neighbour countries during the next few years will include dealing with millions of cubic metres of dredged material. An inventory indicates that the present volume of contaminated soil in Sweden amounts to about 1,500,000 m3 (Magnusson et al, 2006). This inventory only applies to a limited number of harbours (40) and does not include dredging material from fairways or from contaminated sediment in other water areas.