What is the air quality in Boulogne-Billancourt?

Boulogne-Billancourt, France has an annual US AQI of 59 (Reasonable) and average PM2.5 of 13.6 µg/m³, ranking #1937 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Boulogne-Billancourt?

July is typically the cleanest month (AQI 51) and March the most polluted (AQI 69).

Where does Boulogne-Billancourt's air quality data come from?

PM2.5: 1998–2026 (monitors 2021, 2023–2026, satellite 1998–2022; 2026 provisional). Measured by government monitoring stations. Full sources are on the methodology page.

Boulogne-Billancourt, France — Air Quality & Clean City Guide 2026

Boulogne-Billancourt Air Quality Data

Global rank	City	Continent	AQI	PM2.5
1937	Boulogne-Billancourt, France	Europe	AQI 59	PM2.5 13.6 µg/m³