What is the air quality in Hanoi?

Hanoi, Vietnam has an annual US AQI of 109 (Polluted) and average PM2.5 of 38.9 µg/m³, ranking #4907 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Hanoi?

July is typically the cleanest month (AQI 76) and December the most polluted (AQI 144).

Where does Hanoi's air quality data come from?

PM2.5: 1998–2026 (monitors 2024–2026, satellite 1998–2024; 2025–2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Hanoi, Vietnam — Air Quality & Clean City Guide 2026

Hanoi Air Quality Data

Global rank	City	Continent	AQI	PM2.5
4907	Hanoi, Vietnam	Asia	AQI 109	PM2.5 38.9 µg/m³