Chad, DR Congo have dirtiest air in Africa; Réunion, Canary Islands cleanest, IQAir 2025 report

Of the 28 African countries and territories tracked in the IQAir 2025 World Air Quality Report, only one, the French island territory of Réunion, recorded air quality clean enough to meet the World Health Organisation's annual guideline for fine particle pollution. That guideline stands at 5 micrograms per cubic metre (µg/m³) for PM2.5, the tiny airborne particles, invisible to the naked eye, that penetrate deep into the lungs and bloodstream and are linked to heart disease, stroke, cancer and premature death. Réunion recorded 4.3 µg/m³. Every other country on the African continent recorded concentrations above that threshold, and most recorded levels many times higher.

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