What is the air quality in Karatsu?

Karatsu, Japan has an annual US AQI of 63 (Polluted) and average PM2.5 of 14.1 µg/m³, ranking #2467 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Karatsu?

July is typically the cleanest month (AQI 56) and May the most polluted (AQI 85).

Where does Karatsu's air quality data come from?

PM2.5: 1998–2026 (monitors 2010–2026, satellite 1998–2012; 2025–2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Karatsu, Japan — Air Quality & Clean City Guide 2026

Karatsu Air Quality Data

Global rank	City	Continent	AQI	PM2.5
2467	Karatsu, Japan	Asia	AQI 63	PM2.5 14.1 µg/m³