SmogRank / World / Belgium / Flanders / May 2025

Most unhealthy days in Flanders, Belgium, May 2025

22 cities in Flanders, Belgium ranked by their share of unhealthy days over the 31 days. The most unhealthy days: Meulebeke, Belgium, 0 of 25 measured days. 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.

← Meulebeke 0% 0.75%0
Every city in Flanders, Belgium ranked for May 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. 1Meulebeke
    0 of 25
  2. 2Roeselare
    0 of 25
  3. 3Menen
    0 of 24
  4. 4Zelzate
    0 of 25
  5. 4Kortrijk
    0 of 25
  6. 4Grimbergen
    0 of 25
  7. 7Veurne
    0 of 22
  8. 8Stabroek
    0 of 22
  9. 8Damme
    0 of 25
  10. 10Mechelen
    0 of 25
  11. 11Gent
    0 of 25
  12. 12Beveren
    0 of 25
  13. 12Antwerp
    0 of 25
  14. 14Zaventem
    0 of 25
  15. 14Hasselt
    0 of 25
  16. 16Melsele
    0 of 25
  17. 16Houthalen
    0 of 25
  18. 18Mol
    0 of 25
  19. 19Willebroek
    0 of 25
  20. 20Aarschot
    0 of 25
  21. 21Kapellen
    0 of 25
  22. 21Gingelom
    0 of 25
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 Flanders, Belgium, by unhealthy days, PM2.5, May 2025, smogrank.com/be/region/flanders/history/2025-05?by=days (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.