SmogRank / World / Belgium / Flanders / March 2025

Most polluted cities in Flanders, Belgium, March 2025

22 cities in Flanders, Belgium ranked by their average PM2.5 over the 31 days. Worst: Menen at 23.2 µg/m³, #463 of 2,809 cities in the world. Cleanest: Mol at 15.7. 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.

← Menen 21% 20%0
Every city in Flanders, Belgium 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. 1Menen
    21%
  2. 2Roeselare
    17%
  3. 3Veurne
    17%
  4. 4Damme
    14%
  5. 5Hasselt
    13%
  6. 6Meulebeke
    13%
  7. 7Houthalen
    13%
  8. 8Grimbergen
    13%
  9. 9Zelzate
    13%
  10. 10Kortrijk
    13%
  11. 11Stabroek
    13%
  12. 12Zaventem
    13%
  13. 12Beveren
    13%
  14. 14Gingelom
    13%
  15. 15Aarschot
    13%
  16. 16Gent
    8%
  17. 17Antwerp
    8%
  18. 18Mechelen
    8%
  19. 19Melsele
    8%
  20. 20Kapellen
    8%
  21. 21Willebroek
    8%
  22. 22Mol
    8%
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

All cities in the world, March 2025 · All cities in Belgium, March 2025 · Flanders now

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SmogRank, most polluted cities in Flanders, Belgium, PM2.5, March 2025, smogrank.com/be/region/flanders/history/2025-03 (accessed 7 Oct 2026).

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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.