What is the air quality in Nagaoka?

Nagaoka, Japan has an annual US AQI of 57 (Reasonable) and average PM2.5 of 12 µg/m³, ranking #1546 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Nagaoka?

January is typically the cleanest month (AQI 47) and May the most polluted (AQI 72).

PM2.5: 1998–2024 (satellite). From satellite data, because no government monitor covers the city. Full sources are on the methodology page.

Global rank	City	Continent	AQI	PM2.5
1546	Nagaoka, Japan	Asia	AQI 57	PM2.5 12 µg/m³