What is the air quality in Chillán?

Chillán, Chile has an annual US AQI of 70 (Polluted) and average PM2.5 of 19.6 µg/m³, ranking #3259 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Chillán?

December is typically the cleanest month (AQI 45) and May the most polluted (AQI 104).

Where does Chillán's air quality data come from?

PM2.5: 1998–2026 (monitors 2016–2026, satellite 1998–2016, 2018, 2021–2023; 2025–2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Chillán, Chile — Air Quality & Clean City Guide 2026

Chillán Air Quality Data

Global rank	City	Continent	AQI	PM2.5
3259	Chillán, Chile	South America	AQI 70	PM2.5 19.6 µg/m³