Dārchulā reports an annual PM2.5 of 22.5 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 Nepal
Dārchulā: 22.5 µg/m³. Typical range in Nepal: 31.0–45.5 µg/m³. High anchor: Gaur, 55.8 µg/m³.
40 cities tracked