The project conducted the third application of the ⁠OSPAR⁠ Common Procedue for the assessment of the eutrophication status of the German coastal and marine waters of the North Sea, based on data from 2009-2014. The assessment results were also used in the implementation of the Marine Strategy Framework Directive for descriptor 5 “eutrophication”. The project thereby provided decision-making support to the Ministry of Environment (⁠BMU⁠) and the German Environment Agency (⁠UBA⁠) for the national and international implementation of the MSFD as well as the commitments made under OSPAR regarding eutrophication. As a result of the eutrophication assessment, 6 % of Germany’s national waters were assessed as not suffering from eutrophication, 39 % were eutrophic and 55% could not be assessed due to a lack of data.