Capital city, Vietnam
Air quality in Hanoi
Severely polluted
The annual average PM2.5 in Hanoi was 47.9 µg/m³ in 2016, about 9.6 times the WHO guideline of 5 µg/m³. Hanoi's air is among Southeast Asia's worst in winter, with PM2.5 often unhealthy from Oct to Mar; check IQAir and wear an N95 on bad days.
Key facts
- PM2.5: 47.9 µg/m³ yearly average (2016). Measured at Ha Noi.
- Worst months: Oct–Mar.
Air quality across Vietnam
| Place | PM2.5 | Level |
|---|---|---|
| Hue | 13.8 µg/m³ | Moderate |
| Can Tho | 16 µg/m³ | Polluted |
| Ho Chi Minh City | 27 µg/m³ | Very polluted |
| Hanoi | 47.9 µg/m³ | Severely polluted |
Quick answers
Is the air in Hanoi bad?
Severely polluted: 47.9 µg/m³ of PM2.5 on average, 9.6× the WHO guideline. It's usually worst in Oct–Mar.
When is the air worst in Hanoi?
Hanoi's air is among Southeast Asia's worst in winter, with PM2.5 often unhealthy from Oct to Mar; check IQAir and wear an N95 on bad days.
How does Hanoi compare with the rest of Vietnam?
People in Vietnam breathe 25 µg/m³ of PM2.5 on average (2023, World Bank/WHO), against 47.9 µg/m³ measured here.
More about Hanoi
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Sources
- WHO Ambient Air Quality Database
- WHO air quality guidelines (2021)
- Live air quality map (WAQI)
- Hanoi Metro
- Noi Bai International Airport (ACV)
- Grab Vietnam
- Vinmec
Annual averages are measured values reported to the WHO; check a live map for today's air. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.