What is the air quality in Nagahama?

Nagahama, Japan has an annual US AQI of 57 (Reasonable) and average PM2.5 of 12.4 µg/m³, ranking #1574 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Nagahama?

December is typically the cleanest month (AQI 47) and May the most polluted (AQI 75).

Where does Nagahama's air quality data come from?

PM2.5: 1998–2026 (monitors 2012–2026, satellite 1998–2011; 2025–2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Nagahama, Japan — Air Quality & Clean City Guide 2026

Nagahama Air Quality Data

Global rank	City	Continent	AQI	PM2.5
1574	Nagahama, Japan	Asia	AQI 57	PM2.5 12.4 µg/m³