70% of MPAs Contaminated, 90% in Coral Triangle
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- Wildlife Conservation Society and the University of Queensland conducted a study that examined wastewater contamination in marine protected areas.
- Marine protected areas worldwide have more than 70% contamination by untreated or poorly treated wastewater, per the study.
- Coral Triangle—a 2 million‑square‑mile marine region spanning six Southeast Asian nations—shows even higher contamination levels.
- Coastal protected areas in the Coral Triangle have over 90% affected by high levels of sewage pollution.
- Sewage pollution in those Coral Triangle waters is up to ten times higher than in nearby unprotected waters.
- Ocean & Coastal Management published the study this month.
Why it matters: The findings show that the very zones designed to protect coral reefs are largely compromised by sewage, eroding biodiversity and the ecosystem services that fisheries and tourism rely on across the Indo‑Pacific. This undermines the effectiveness of marine protected areas and signals urgent need for improved wastewater management to preserve marine health and the livelihoods of coastal communities.
