Tsiombe reports an annual PM2.5 of 3.3 µg/m³. That's below the WHO 2021 annual guideline of 5 µg/m³ — cleaner than most cities on the continent.
Compared across Madagascar
Tsiombe: 3.3 µg/m³. Typical range in Madagascar: 5.6–8.3 µg/m³. High anchor: Antananarivo, 17.8 µg/m³.
97 cities tracked