SmogRank / World / Europe / France / Centre-Val de Loire

Most polluted cities in Centre-Val de Loire, France

10 measured cities, last 7 days; 0 above the WHO 24-hour guideline. Worst: Dreux at 8.9 µg/m³, #1,006 in the world.

Île-de-France: 6 measured citiesCentre-Val de Loire: 10 measured citiesBourgogne-Franche-Comté: 4 measured citiesNormandyHauts-de-France: 14 measured citiesGrand Est: 9 measured citiesPays de la LoireNew Aquitaine: 9 measured citiesAuvergne-Rhône-Alpes: 18 measured cities#10 Bourges: 6.0 µg/m³#8 Châteauroux: 6.1 µg/m³#9 Blois: 6.1 µg/m³#7 Tours: 6.3 µg/m³#6 Joué-lès-Tours: 6.9 µg/m³#5 Olivet: 7.0 µg/m³#4 Montargis: 7.3 µg/m³#2 Orléans: 8.2 µg/m³#3 Chartres: 8.2 µg/m³#1 Dreux: 8.9 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Dreux 8.9 µg/m³ 15 µg/m³ WHO 24-hour guideline0
Every measured city in Centre-Val de Loire, France, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1Dreux 8.9▼225
  2. 2Orléans 8.2▼189
  3. 3Chartres 8.2▼389
  4. 4Montargis 7.3▼358
  5. 5Olivet 7.0▼376
  6. 6Joué-lès-Tours 6.9▼375
  7. 7Tours 6.3▼345
  8. 8Châteauroux 6.1▼283
  9. 9Blois 6.1▼377
  10. 10Bourges 6.0▼320
Good0–5
Fair6–15
Moderate16–50
Poor51–90
Very poor91–140
Extremely poor141+

The European Environment Agency's air quality index bands for PM2.5 (2024 revision); it has bands, not numbers, so values stay in µg/m³. 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.

City7-day estimateBand
Vierzon≈ 6 µg/m³Fair
Fleury-les-Aubrais≈ 7 µg/m³Fair
Romorantin-Lanthenay≈ 6 µg/m³Fair
Saint-Jean-de-Braye≈ 7 µg/m³Fair
Vendôme≈ 7 µg/m³Fair
Lucé≈ 8 µg/m³Fair
Saint-Jean-de-la-Ruelle≈ 7 µg/m³Fair
Saint-Cyr-sur-Loire≈ 7 µg/m³Fair
Saran≈ 7 µg/m³Fair
Saint-Avertin≈ 6 µg/m³Fair
Châteaudun≈ 7 µg/m³Fair
Gien≈ 7 µg/m³Fair
Saint-Pierre-des-Corps≈ 6 µg/m³Fair

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SmogRank, most polluted cities in Centre-Val de Loire, France, PM2.5, last 7 days to 2 Oct 2026, 07:00 UTC, smogrank.com/fr/region/centre-val-de-loire?w=7d.

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Updated 2026-10-02 07:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors in µg/m³.