What is the air quality in Hachiōji?

Hachiōji, Japan has an annual US AQI of 57 (Reasonable) and average PM2.5 of 12.5 µg/m³, ranking #1585 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Hachiōji?

December is typically the cleanest month (AQI 48) and July the most polluted (AQI 68).

Where does Hachiōji's air quality data come from?

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

Hachiōji, Japan — Air Quality & Clean City Guide 2026

Hachiōji Air Quality Data

Global rank	City	Continent	AQI	PM2.5
1585	Hachiōji, Japan	Asia	AQI 57	PM2.5 12.5 µg/m³