This page will collect all reports and links to data and further details. Later, it will also contain high-resolution versions of all maps and figures used in the report.

State of the Baltic Sea report – First version 2017

HELCOM HOLAS 2017 A4 Cover 210px

Sample Heading

Supplementary reports

Uncorrected first drafts of the following supplementary reports available upon request: jannica.haldin(at)

  • Integrated assessment of eutrophication
  • Assessment of cumulative impacts on the seafloor


Figures as image file downloads coming soon. Meanwhile, downloading is available by right-clicking the figures on the content pages of this website.

In Brief

Figure ES1. Summary of the assessment of pressures and status for the Baltic Sea

In Brief > Summary of findings

Figure ES2. Status of pressure-based core indicators for eutrophication, hazardous substances and non- indigenous species by sub-basin
Figure ES3. Status of biodiversity core indicators by sub-basin
Figure ES4. Status of commercial fish

In Brief  > Our Baltic Sea

Figure 1.1. The Baltic Sea is surrounded by nine countries, covers an area of around 420 000 km2, and has a drainage area around four times the size.
Figure 1.2. The Baltic Sea is characterised by brackish water and a decreasing salinity from its entrance in the southwest to the inner parts. This also affects the distribution of species
Figure 1.3. A schematic, simplified illustration of the food-web structure in the Baltic Sea
Figure 1.4. Changes over time in the maximum extent of sea ice during winter (km2) since 1720, and in the cumulative number of ice days per winter since 1971.
Figure 1.5. Changes over time in the seawater temperature in the Bornholm Deep and the Gotland Deep
Figure 1.6. Changes over time in surface water and deep water salinity
Figure 1.7. Changes in pH over time in the surface water of the Bornholm Deep and the Gotland Deep during 1995–2015
Figure 1.8. Intensity of inflow events to the Baltic Sea between 1880 and 2015
Figure 1.9. Poor oxygen conditions at the sea floor restrict productivity and biodiversity in the Baltic Sea
Figure B1.2.1. Salmon eggs hatch in rivers with outflows into the Baltic Sea and spend the first parts of their lifecycle there
Figure B1.2.2. Bladderwrack is an important habitat-forming seaweed which colonises hard substrates in the Baltic Sea