Baltic Marine Environment
Protection Commission


Eutrophication is one of the main threats to the biodiversity of the Baltic Sea and is caused by excessive inputs of nutrients to the marine environment.

​Eutrophication is driven by a surplus of the nutrients nitrogen and phosphorus in the sea. Nutrient over-enrichment causes elevated levels of algal and plant growth, increased turbidity, oxygen depletion, changes in species composition and nuisance blooms of algae. 

HELCOM strives to achieve the Baltic Sea Action Plan goal of: A Baltic Sea unaffected by eutrophication.