HELCOM Contracting Parties have been monitoring the state of the Baltic
Sea jointly for decades. This extensive amount of data shows how the
marine environment has changed over time.
Holistic assessments give a
comprehensive overview of the ecosystem health of the entire regional sea. These major assessments assist the region's
environmental managers and decision-makers, so that they can base
their work on sound, up-to-date knowledge of the status of the sea.
HELCOM monitors the trends of the marine environment and how the environment responds to management actions. The trends are followed under the four thematic sections of the Baltic Sea Action Plan:
BiodiversityEutrophicationHazardous substancesMaritime activities.
HELCOM regularly produces a Pollution Load
Compilation (PLC), which assesses the data collected by the Contracting
Parties on total air and waterborne inputs of nutrients and some
hazardous substances to the Baltic Sea.
Commonly agreed indicators are regularly updated to periodically produce thematic and holistic assessments.
Phosphorus inputs via water ways (Baltic proper). Peak year was 1981.
State of the Baltic Sea - First version 2017 - to be updated 2018 (PDF 19 MB)
HELCOM Monitoring and Assessment strategy