SmogRank / World / France / Hauts-de-France / 2026
Most polluted cities in Hauts-de-France, France, 2026
13 cities in Hauts-de-France, France ranked by their average PM2.5 so far (278 of 365 days); 13 above the WHO annual guideline (5.0 µg/m³). Worst: Dunkirk at 10.8 µg/m³, #847 of 2,745 cities in the world. Cleanest: Creil at 8.2. A city needs measurements on 70% of the days to be ranked.
Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.
- 1Boulogne-sur-Mer 3%
- 2Béthune 3%
- 3Roubaix 2%
- 4Valenciennes 2%
- 5Calais 2%
- 6Denain 2%
- 7Lille 2%
- 8Amiens 2%
- 9Dunkirk 2%
- 10Douai 1%
- 11Beauvais 1%
- 12Creil 1%
- 13Saint-Quentin 1%
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
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SmogRank, most polluted cities in Hauts-de-France, France, PM2.5, 2026 (so far), smogrank.com/fr/region/hauts-de-france/history/2026 (accessed 6 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.