SmogRank / World / France / Centre-Val de Loire / March 2025

Most polluted cities in Centre-Val de Loire, France, March 2025

10 cities in Centre-Val de Loire, France ranked by their average PM2.5 over the 31 days. Worst: Orléans at 13.9 µg/m³, #1,042 of 2,809 cities in the world. Cleanest: Tours at 10.3. A city needs measurements on 70% of the days to be ranked.

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.

← Chartres 4% 4%0
Every city in Centre-Val de Loire, France ranked for March 2025, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.
  1. 1Chartres
    4%
  2. 2Orléans
    0%
  3. 3Olivet
    0%
  4. 4Dreux
    0%
  5. 5Montargis
    0%
  6. 6Châteauroux
    0%
  7. 7Blois
    0%
  8. 8Bourges
    0%
  9. 9Joué-lès-Tours
    0%
  10. 10Tours
    0%
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

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SmogRank, most polluted cities in Centre-Val de Loire, France, PM2.5, March 2025, smogrank.com/fr/region/centre-val-de-loire/history/2025-03 (accessed 6 Oct 2026).

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