What is the air quality in Kalgoorlie-Boulder?

Kalgoorlie-Boulder, Australia has an annual US AQI of 23 (Excellent) and average PM2.5 of 3.8 µg/m³, ranking #23 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Kalgoorlie-Boulder?

April is typically the cleanest month (AQI 20) and January the most polluted (AQI 27).

Where does Kalgoorlie-Boulder's air quality data come from?

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

Kalgoorlie-Boulder, Australia — Air Quality & Clean City Guide 2026

Kalgoorlie-Boulder Air Quality Data

Global rank	City	Continent	AQI	PM2.5
23	Kalgoorlie-Boulder, Australia	Oceania	AQI 23	PM2.5 3.8 µg/m³