What is the air quality in Oyama?

Oyama, Japan has an annual US AQI of 61 (Polluted) and average PM2.5 of 13.7 µg/m³, ranking #2192 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Oyama?

January is typically the cleanest month (AQI 55) and July the most polluted (AQI 71).

Where does Oyama's air quality data come from?

PM2.5: 1998–2026 (monitors 2011–2026, satellite 1998–2011, 2020; 2025–2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Oyama, Japan — Air Quality & Clean City Guide 2026

Oyama Air Quality Data

Global rank	City	Continent	AQI	PM2.5
2192	Oyama, Japan	Asia	AQI 61	PM2.5 13.7 µg/m³