What is the air quality in Nagasaki?

Nagasaki, Japan has an annual US AQI of 60 (Reasonable) and average PM2.5 of 13.8 µg/m³, ranking #2067 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Nagasaki?

July is typically the cleanest month (AQI 53) and May the most polluted (AQI 72).

Where does Nagasaki's air quality data come from?

PM2.5: 1998–2026 (monitors 2013–2026, satellite 1998–2013; 2025–2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Nagasaki, Japan — Air Quality & Clean City Guide 2026

Nagasaki Air Quality Data

Global rank	City	Continent	AQI	PM2.5
2067	Nagasaki, Japan	Asia	AQI 60	PM2.5 13.8 µg/m³