The global Ocean Health Index measures the state of the world’s oceans.
The global OHI score for the 2023 assessment was 73. This interactive map shows how different countries and goals contributed to this score, as well as how the score has changed since 2012. Click on colored regions (i.e. EEZs) to see short country summaries.
Results are shown for the exclusive economic zone (EEZ) of 220 coastal countries or territories. EEZs generally extend 200 nautical miles (370 KM) offshore from the coast and describe the part of the ocean that a country assumes jurisdiction for the exploration and use of resources.
A country’s Index score is the average of 10 “goal” scores which represent the ecological, social, and economic benefits that people expect from healthy oceans. Each goal is scored from 0 to 100 based on the delivery of benefits with respect to a sustainable target. Lower scores indicate that more benefits could be gained or that current methods are harming the delivery of future benefits. When a goal is not relevant to a specific region, no value (N/A) is shown and that goal is not included in the calculation of the region’s overall Index score.
The global score is the average of the country scores, weighted by the area of their EEZ.