GES under criteria D10C1 is determined via indicators 'contamination ratio of beach litter', 'macrolitter on seafloor in coastal sea (natural areas)' and 'macrolitter on seafloor in coastal sea (areas affected by human activities)'. GES for contamination ratio of beach litter is achieved if the contamination ratio value is <1. GES for macrolitter on seafloor in coastal sea (natural areas) is achieved if the litter amount in seafloor is <1000 items per km2. GES for macrolitter on seafloor in coastal sea (areas affected by human activities) is achieved if the litter amount is <5000 items per km2.

GES under criteria D10C2 has determined via two indicators 'microlitter in the surface layer of the water column' and 'microlitter in seabed sediment'. First monitoring activities have been carried out in Gulf of Finland and in Northern Baltic Proper and the results are used as baseline (temporary threshold value). Baseline year for microlitter in the surface layer of the water column is 2016. Baseline year for microlitter in seabed sediment is 2017.