SmogRank / World / Europe / France / Auvergne-Rhône-Alpes
Most polluted cities in Auvergne-Rhône-Alpes, France
20 measured cities, this year; 20 above the WHO annual guideline. Worst: Romans-sur-Isère at 9.3 µg/m³, #1,201 in the world.
About 2.1K people in these 2 cities breathed unhealthy air on an average day so far this year.
Ranked by people: each city's population times its share of unhealthy days, those with a daily mean over 35.4 µg/m³ (US AQI 101+). That is how many people living there breathed unhealthy air on an average day. Only cities measured at 2 or more places at least 3 km apart are ranked: one monitor shouldn't speak for a whole city. Population is the city itself, not its wider metro area.
Cities coloured by their PM2.5 over the last 24 hours. Fires, smoke and ash: Oct 5, the newest UTC day mapped.
- 1Lyon 2.1K
- 2Clermont-Ferrand 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
Estimated: cities without a monitor
Auvergne-Rhône-Alpes cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.
| City | 7-day estimate |
|---|---|
| Villeurbanne | ≈ 10 µg/m³ |
| Vénissieux | ≈ 10 µg/m³ |
| Caluire-et-Cuire | ≈ 10 µg/m³ |
| Saint-Priest | ≈ 10 µg/m³ |
| Roanne | ≈ 6 µg/m³ |
| Bron | ≈ 10 µg/m³ |
| Vaulx-en-Velin | ≈ 10 µg/m³ |
| Montélimar | ≈ 8 µg/m³ |
| Saint-Martin-d'Hères | ≈ 7 µg/m³ |
| Échirolles | ≈ 7 µg/m³ |
| Vienne | ≈ 10 µg/m³ |
| Thonon-les-Bains | ≈ 11 µg/m³ |
| Meyzieu | ≈ 9 µg/m³ |
| Rillieux-la-Pape | ≈ 10 µg/m³ |
| Aix-les-Bains | ≈ 9 µg/m³ |
| Oyonnax | ≈ 7 µg/m³ |
| Oullins | ≈ 10 µg/m³ |
| Décines-Charpieu | ≈ 10 µg/m³ |
| Fontaine | ≈ 7 µg/m³ |
| Le Puy-en-Velay | ≈ 6 µg/m³ |
| Voiron | ≈ 7 µg/m³ |
| Sainte-Foy-lès-Lyon | ≈ 10 µg/m³ |
| Annecy-le-Vieux | ≈ 13 µg/m³ |
| Saint-Genis-Laval | ≈ 10 µg/m³ |
| Chamalières | ≈ 5 µg/m³ |
| Meylan | ≈ 7 µg/m³ |
| Riom | ≈ 6 µg/m³ |
| Cluses | ≈ 11 µg/m³ |
| Bourg-lès-Valence | ≈ 8 µg/m³ |
| Villefontaine | ≈ 9 µg/m³ |
| Écully | ≈ 10 µg/m³ |
| Cran-Gevrier | ≈ 13 µg/m³ |
| Cournon-d'Auvergne | ≈ 5 µg/m³ |
| Seynod | ≈ 13 µg/m³ |
| Annonay | ≈ 8 µg/m³ |
| Firminy | ≈ 6 µg/m³ |
| Tassin-la-Demi-Lune | ≈ 10 µg/m³ |
| Sallanches | ≈ 8 µg/m³ |
| Montbrison | ≈ 6 µg/m³ |
| Saint-Fons | ≈ 10 µg/m³ |
Bad-air episodes in Auvergne-Rhône-Alpes
- France, July 202625 to 26 July 2026, 2 days28 cities151 µg/m³peak, Limoges
- Europe, 18 to 25 March 20268 days430 cities136 µg/m³peak, Łask
- Europe, 1 to 12 March 202612 days532 cities109 µg/m³peak, Radomsko
- Europe, January and February 202612 January to 12 February 2026, 32 days625 cities252 µg/m³peak, Travnik
- Germany and France, January 20266 January 2026, 1 day15 cities34 µg/m³peak, Speyer
- Europe, December 2025 to January 202625 December 2025 to 2 January 2026, 9 days189 cities110 µg/m³peak, Kempten (Allgäu)
Times when many cities around here had PM2.5 at twice their usual or more on the same days.
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SmogRank, most polluted cities in Auvergne-Rhône-Alpes, France, PM2.5, this year to 7 Oct 2026, 00:00 UTC, smogrank.com/fr/region/auvergne-rhone-alpes?w=year.
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.
Updated 2026-10-07 00:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.