SmogRank / History / City race
Cities in France, worst air first, day by day
Each measured city's average over the 30 days to every day since January 2023, worst first. Find your own city to follow it through the race, or keep to one country.
The worst cities in France for PM2.5 over the 30 days to 18 Mar 2025: Strasbourg 21.5 µg/m³, Dunkirk 21.4 µg/m³ and Montbéliard 20.7 µg/m³.
- 1StrasbourgGrand Est21.5
- 2DunkirkHauts-de-France21.4
- 3MontbéliardBourgogne-Franche-Comté20.7
- 4CreilHauts-de-France19.7
- 5ReimsGrand Est19.3
- 6CoulommiersÎle-de-France18.9
- 7MulhouseGrand Est18.7
- 8SallanchesAuvergne-Rhône-Alpes18.2
- 9PassyAuvergne-Rhône-Alpes18.2
- 10OrléansCentre-Val de Loire17.9
- 11NancyGrand Est17.8
- 12DenainHauts-de-France17.8
- 13AnnemasseAuvergne-Rhône-Alpes17.7
- 14RouenNormandy17.5
- 15Le HavreNormandy17.4
- 16AmiensHauts-de-France17.4
- 17Romans-sur-IsèreAuvergne-Rhône-Alpes17.2
- 18ÉpinalGrand Est17.1
- 19ParisÎle-de-France16.9
- 20ThionvilleGrand Est16.5
+ 63 more cities, the next at 16.2 µg/m³
Not counted on this day, too few days measured: Bellegarde-sur-Valserine since 12 Mar 2025, Bourg-en-Bresse since 11 Mar 2025, Saint-Dizier since 5 Mar 2025 and 7 more cities.
Cities counted each day
A city's number is its average over the 30 days, shown only when 21 of them were measured (5 of 7 on the 7-day race), the same minimum as the 30- and 7-day boards. A city whose monitors go quiet fades out where it stood rather than sliding down, so a gap never reads as cleaner air. Some large countries are thin or missing because their monitors' licences don't allow reuse. How we rank.
Not covered: the government monitoring networks of China and Turkey, which publish only on their own websites. We are building the reader for China's network. Turkey's network doesn't answer requests from outside the country, so we can't read it. Most cities there are missing from this board, not clean. Why.