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 19 Apr 2024: Nantes 5.8 µg/m³, Montoir-de-Bretagne 5.5 µg/m³ and La Roche-sur-Yon 5.3 µg/m³.
- 1NantesPays de la Loire5.8
- 2Montoir-de-BretagnePays de la Loire5.5
- 3La Roche-sur-YonPays de la Loire5.3
- 4DongesPays de la Loire5.3
- 5Saint-Étienne-de-MontlucPays de la Loire5.1
- 6CouëronPays de la Loire5.1
- 7AngersPays de la Loire4.9
- 8JuignéPays de la Loire4.6
Not counted on this day, too few days measured: Vitrolles since 18 Mar 2024, Vesoul since 18 Mar 2024, Valenciennes since 18 Mar 2024 and 48 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 readers for them. Most cities there are missing from this board, not clean. Why.