SmogRank / World / France / Auvergne-Rhône-Alpes / April 2025
Most polluted cities in Auvergne-Rhône-Alpes, France, April 2025
16 cities in Auvergne-Rhône-Alpes, France ranked by their average PM2.5 over the 30 days. Worst: Romans-sur-Isère at 6.3 µg/m³, #2,171 of 2,896 cities in the world. Cleanest: Aurillac at 3.4. 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 0%
- 2Lyon 0%
- 3Valence 0%
- 4Villefranche-sur-Saône 0%
- 4L'Isle-d'Abeau 0%
- 4Annemasse 0%
- 7Bourg-en-Bresse 0%
- 8Vichy 0%
- 9Moulins 0%
- 9Clermont-Ferrand 0%
- 11Montluçon 0%
- 12Albertville 0%
- 13Grenoble 0%
- 14Crolles 0%
- 14Chambéry 0%
- 16Aurillac 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, April 2025, smogrank.com/fr/region/auvergne-rhone-alpes/history/2025-04 (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.