What is the air quality in Bielefeld?

Bielefeld, Germany has an annual US AQI of 59 (Reasonable) and average PM2.5 of 13.8 µg/m³, ranking #1985 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Bielefeld?

July is typically the cleanest month (AQI 52) and March the most polluted (AQI 70).

Where does Bielefeld's air quality data come from?

PM2.5: 1998–2026 (monitors 2008–2010, 2015–2026, satellite 1998–2007, 2011–2014; 2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Bielefeld, Germany — Air Quality & Clean City Guide 2026

Bielefeld Air Quality Data

Global rank	City	Continent	AQI	PM2.5
1985	Bielefeld, Germany	Europe	AQI 59	PM2.5 13.8 µg/m³