An integrated assessment of the pelagic habitats of Polish Marine Waters has revealed a subGES status of a number of Marine Reporting Units. The reasons for such an outcome of the assessment were high chlorophyll a concentrations and strong cyanobacterial blooms. Both are caused directly by elevated nutrient concentrations. Therefore, no lasting improvement can be expected with regard to pelagic habitats for as long as nutrient levels in surface water layers remain high. As explained in the case of Exception XX (Non-achievement of GES with regard to descriptor D5 ""Eutrophication""), the required reductions of nutrient levels in Polish Marine Waters will be impossible without significant efforts on the part of other countries of the Baltic Sea Basin, i.e. Denmark, Estonia, Finland, Germany, Lithuaniam, Latvia, Russia and Sweden, but also Belarus, the Czech Republic and Ukraine.

An integrated assessment of the pelagic habitats of Polish Marine Waters has revealed a subGES status of a number of Marine Reporting Units. The reasons for such an outcome of the assessment were high chlorophyll a concentrations and strong cyanobacterial blooms. Both are caused directly by elevated nutrient concentrations. Therefore, no lasting improvement can be expected with regard to pelagic habitats for as long as nutrient levels in surface waters remain high. As explained in the case of Exception XX (Non-achievement of GES with regard to descriptor D5 ""Eutrophication""), achievement of the reqiured reductions of nutrient levels in seawater is very unlikely before 2050.