Tchibanga reports an annual PM2.5 of 19.4 µg/m³. That's meaningfully above the WHO 2021 guideline of 5 µg/m³ yet within the EU annual limit of 25 µg/m³.
Compared across Gabon
Tchibanga: 19.4 µg/m³. Typical range in Gabon: 19.4–28.1 µg/m³. Low anchor: Port-Gentil, 16.0 µg/m³. High anchor: Franceville, 33.1 µg/m³.
13 cities tracked