What is the air quality in Niigata?

Niigata, Japan has an annual US AQI of 55 (Reasonable) and average PM2.5 of 11.5 µg/m³, ranking #1300 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Niigata?

December is typically the cleanest month (AQI 44) and May the most polluted (AQI 69).

Where does Niigata's air quality data come from?

PM2.5: 1998–2026 (monitors 2010–2026, satellite 1998–2010; 2025–2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Niigata, Japan — Air Quality & Clean City Guide 2026

Niigata Air Quality Data

Global rank	City	Continent	AQI	PM2.5
1300	Niigata, Japan	Asia	AQI 55	PM2.5 11.5 µg/m³