SmogRank / World / Europe / France / Auvergne-Rhône-Alpes

Most polluted cities in Auvergne-Rhône-Alpes, France

20 measured cities, last 30 days; 0 above the WHO 24-hour guideline. Worst: Grenoble at 6.8 µg/m³, #1,411 in the world.

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.

← Grenoble 0% 0.75%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	Band
Villeurbanne	≈ 10 µg/m³	Moderate
Vénissieux	≈ 10 µg/m³	Moderate
Caluire-et-Cuire	≈ 10 µg/m³	Moderate
Saint-Priest	≈ 10 µg/m³	Moderate
Roanne	≈ 6 µg/m³	Good
Bron	≈ 10 µg/m³	Moderate
Vaulx-en-Velin	≈ 10 µg/m³	Moderate
Montélimar	≈ 8 µg/m³	Good
Saint-Martin-d'Hères	≈ 7 µg/m³	Good
Échirolles	≈ 7 µg/m³	Good
Vienne	≈ 10 µg/m³	Moderate
Thonon-les-Bains	≈ 11 µg/m³	Moderate
Meyzieu	≈ 9 µg/m³	Moderate
Rillieux-la-Pape	≈ 10 µg/m³	Moderate
Aix-les-Bains	≈ 9 µg/m³	Moderate
Oyonnax	≈ 7 µg/m³	Good
Oullins	≈ 10 µg/m³	Moderate
Décines-Charpieu	≈ 10 µg/m³	Moderate
Fontaine	≈ 7 µg/m³	Good
Le Puy-en-Velay	≈ 6 µg/m³	Good
Voiron	≈ 7 µg/m³	Good
Sainte-Foy-lès-Lyon	≈ 10 µg/m³	Moderate
Annecy-le-Vieux	≈ 13 µg/m³	Moderate
Saint-Genis-Laval	≈ 10 µg/m³	Moderate
Chamalières	≈ 5 µg/m³	Good
Meylan	≈ 7 µg/m³	Good
Riom	≈ 6 µg/m³	Good
Cluses	≈ 11 µg/m³	Moderate
Bourg-lès-Valence	≈ 8 µg/m³	Good
Villefontaine	≈ 9 µg/m³	Moderate
Écully	≈ 10 µg/m³	Moderate
Cran-Gevrier	≈ 13 µg/m³	Moderate
Cournon-d'Auvergne	≈ 5 µg/m³	Good
Seynod	≈ 13 µg/m³	Moderate
Annonay	≈ 8 µg/m³	Good
Firminy	≈ 6 µg/m³	Good
Tassin-la-Demi-Lune	≈ 10 µg/m³	Moderate
Sallanches	≈ 8 µg/m³	Good
Montbrison	≈ 6 µg/m³	Good
Saint-Fons	≈ 10 µg/m³	Moderate

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, last 30 days to 7 Oct 2026, 00:00 UTC, smogrank.com/fr/region/auvergne-rhone-alpes?w=30d.

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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.