Key messages: Monitoring chlorophyll-a levels is key for assessing coastal and marine water quality. 95% of monitoring stations in Europe’s seas revealed no significant trend. Between 1980 and 2021, the number of locations with decreasing trends exceeded the number of locations with increasing trends in all sea regions. These findings highlight the ongoing risks of eutrophication for Europe’s seas.

References and footnotes

  1. EU, 2008, Directive 2008/56/EC of the European Parliament and of the Council of 17 June 2008 establishing a framework for community action in the field of marine environmental policy (Marine Strategy Framework Directive) (OJ L 164, 25.6.2008, p. 19-40)
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