SmogRank / World / Europe / France / Centre-Val de Loire
Most polluted cities in Centre-Val de Loire, France
10 measured cities, last 30 days; 0 above the WHO 24-hour guideline. Worst: Montargis at 5.8 µg/m³, #1,859 in the world.
About 0 people in this city breathed unhealthy air on an average day over the last 30 days.
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.
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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
Centre-Val de Loire 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 |
|---|---|
| Vierzon | ≈ 5 µg/m³ |
| Fleury-les-Aubrais | ≈ 6 µg/m³ |
| Romorantin-Lanthenay | ≈ 5 µg/m³ |
| Saint-Jean-de-Braye | ≈ 6 µg/m³ |
| Vendôme | ≈ 5 µg/m³ |
| Lucé | ≈ 6 µg/m³ |
| Saint-Jean-de-la-Ruelle | ≈ 6 µg/m³ |
| Saint-Cyr-sur-Loire | ≈ 5 µg/m³ |
| Saran | ≈ 6 µg/m³ |
| Saint-Avertin | ≈ 5 µg/m³ |
| Châteaudun | ≈ 5 µg/m³ |
| Gien | ≈ 5 µg/m³ |
| Saint-Pierre-des-Corps | ≈ 5 µg/m³ |
Bad-air episodes in Centre-Val de Loire
- 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
- France, January 20264 January 2026, 1 day10 cities33 µg/m³peak, Tours
- Europe, December 2025 to January 202625 December 2025 to 2 January 2026, 9 days189 cities110 µg/m³peak, Kempten (Allgäu)
- France and United Kingdom, April 202527 April 2025, 1 day8 cities29 µg/m³peak, Le Havre
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 Centre-Val de Loire, France, PM2.5, last 30 days to 6 Oct 2026, 22:00 UTC, smogrank.com/fr/region/centre-val-de-loire?w=30d.
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 2026-10-06 22:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.