According to the EU framework directive for water, all water areas in EU shall be of goodecological quality no later than 2015. The programmes necessary to achieve the standardmust also be cost-effective. There is a clear need for knowledge among civil servants,politicians, industry and, not least, the general public about which measures are the mosteffective. Information within these groups is essential so that the Baltic Sea can once againbe an inland sea with good ecological, economical and esthetical qualities.The aim of the project was to create a common decision-making system, divided in aset of tools for the entire archipelago region Åboland-Åland-Stockholm. With the help ofthe decision-making support system, it shall be possible to evaluate various programmes toimprove water quality in advance. One shall be able to clarify the significance of local andregional actions in comparison with actions in other locales, and thereby be able to makeconclusions about which actions are the most effective. Achievements: Please refer to the 'Description' field, which also includes the achievements of this project.