SmogRank / World / France / Auvergne-Rhône-Alpes / 2025
Most polluted cities in Auvergne-Rhône-Alpes, France, 2025
14 cities in Auvergne-Rhône-Alpes, France ranked by their average PM2.5 over the 365 days; 14 above the WHO annual guideline (5.0 µg/m³). Worst: Romans-sur-Isère at 10.8 µg/m³, #743 of 2,624 cities in the world. Cleanest: Aurillac at 5.1. 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.
- 1Romans-sur-Isère 3%
- 2Lyon 3%
- 3L'Isle-d'Abeau 2%
- 4Villefranche-sur-Saône 2%
- 5Grenoble 2%
- 6Annemasse 1%
- 7Crolles 1%
- 8Saint-Étienne 1%
- 9Moulins 1%
- 10Albertville 0%
- 11Montluçon 0%
- 12Clermont-Ferrand 0%
- 13Vichy 0%
- 14Aurillac 0%
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 Auvergne-Rhône-Alpes, France, PM2.5, 2025, smogrank.com/fr/region/auvergne-rhone-alpes/history/2025 (accessed 7 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.