What is the air quality in Oshu?

Oshu, Japan has an annual US AQI of 53 (Reasonable) and average PM2.5 of 10.9 µg/m³, ranking #1056 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Oshu?

January is typically the cleanest month (AQI 47) and May the most polluted (AQI 63).

Where does Oshu's air quality data come from?

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

Oshu, Japan — Air Quality & Clean City Guide 2026

Oshu Air Quality Data

Global rank	City	Continent	AQI	PM2.5
1056	Oshu, Japan	Asia	AQI 53	PM2.5 10.9 µg/m³