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: Dreux at 5.7 µg/m³, #1,448 in the world.

Île-de-France: 6 measured citiesCentre-Val de Loire: 10 measured citiesBourgogne-Franche-Comté: 4 measured citiesNormandy: 9 measured citiesHauts-de-France: 13 measured citiesGrand Est: 9 measured citiesPays de la LoireNew Aquitaine: 9 measured citiesAuvergne-Rhône-Alpes: 18 measured cities#10 Châteauroux: 4.3 µg/m³#9 Bourges: 4.4 µg/m³#8 Blois: 4.5 µg/m³#6 Tours: 4.6 µg/m³#7 Olivet: 4.6 µg/m³#5 Joué-lès-Tours: 4.8 µg/m³#4 Orléans: 5.2 µg/m³#3 Montargis: 5.4 µg/m³#2 Chartres: 5.5 µg/m³#1 Dreux: 5.7 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Dreux 5.7 WHO 24-hour guideline
Every measured city in Centre-Val de Loire, France, one column each, worst on the left and cleanest on the right. Point at it to read a city; tap to open it.
  1. 1Dreux 32
  2. 2Chartres 31
  3. 3Montargis 30
  4. 4Orléans 29
  5. 5Joué-lès-Tours 27
  6. 6Tours 26
  7. 7Olivet 26
  8. 8Blois 25
  9. 9Bourges 24
  10. 10Châteauroux 24
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

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.

City7-day estimateBand
Vierzon≈ 6 µg/m³Good
Fleury-les-Aubrais≈ 7 µg/m³Good
Romorantin-Lanthenay≈ 6 µg/m³Good
Saint-Jean-de-Braye≈ 7 µg/m³Good
Vendôme≈ 7 µg/m³Good
Lucé≈ 8 µg/m³Good
Saint-Jean-de-la-Ruelle≈ 7 µg/m³Good
Saint-Cyr-sur-Loire≈ 7 µg/m³Good
Saran≈ 7 µg/m³Good
Saint-Avertin≈ 6 µg/m³Good
Châteaudun≈ 7 µg/m³Good
Gien≈ 7 µg/m³Good
Saint-Pierre-des-Corps≈ 6 µg/m³Good

Use this board

SmogRank, most polluted cities in Centre-Val de Loire, France, PM2.5, last 30 days to 2 Oct 2026, 01:00 UTC, smogrank.com/fr/region/centre-val-de-loire?w=30d.

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.

Updated 2026-10-02 01:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.