SDG 14 · Indicator

Ocean Health Index: Clean Waters score

worst 0-100 best

Displaying Ratings

Ratings provide a visual representation of a country’s performance on the indicator.


Click on a country to see its performance.

SDG achieved

Challenges remain

Significant challenges remain

Major challenges remain

Information unavailable


The clean waters subgoal of the Ocean Health Index measures to what degree marine waters under national jurisdictions have been contaminated by chemicals, excessive nutrients (eutrophication), human pathogens, and trash.

Long-Term Objective

Technical Optimum

The long-term objective for this indicator is a value of 100.


Ocean Health Index (2019). Ocean Health Index 2019 global assessment. National Center for Ecological Analysis and Synthesis, University of California, Santa Barbara. Available from:

Ocean Health Index: Clean Waters score