What is the air quality in Basel?

Basel, Switzerland has an annual US AQI of 58 (Reasonable) and average PM2.5 of 13.2 µg/m³, ranking #1791 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Basel?

May is typically the cleanest month (AQI 49) and January the most polluted (AQI 71).

Where does Basel's air quality data come from?

PM2.5: 1998–2026 (monitors 1998–2026, satellite 2010–2016; 2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Basel, Switzerland — Air Quality & Clean City Guide 2026

Basel Air Quality Data

Global rank	City	Continent	AQI	PM2.5
1791	Basel, Switzerland	Europe	AQI 58	PM2.5 13.2 µg/m³