SmogRank / World / Belgium / Flanders / August 2025

Most polluted cities in Flanders, Belgium, August 2025

25 cities in Flanders, Belgium ranked by their average PM2.5 over the 31 days. Worst: Zelzate at 8.8 µg/m³, #1,508 of 2,841 cities in the world. Cleanest: Gingelom at 5.9. 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.

← Zelzate 0% 0.75%0
Every city in Flanders, Belgium ranked for August 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. 1Zelzate
    0%
  2. 2Meulebeke
    0%
  3. 2Ertvelde
    0%
  4. 4Roeselare
    0%
  5. 5Stabroek
    0%
  6. 6Melsele
    0%
  7. 7Grimbergen
    0%
  8. 7Gent
    0%
  9. 7Antwerp
    0%
  10. 10Knokke-Heist
    0%
  11. 10Beveren
    0%
  12. 12Mol
    0%
  13. 12Kortrijk
    0%
  14. 14Hasselt
    0%
  15. 15Kapellen
    0%
  16. 15Houthalen
    0%
  17. 15Genk
    0%
  18. 18Menen
    0%
  19. 18Mechelen
    0%
  20. 18Damme
    0%
  21. 21Willebroek
    0%
  22. 22Zaventem
    0%
  23. 22Veurne
    0%
  24. 24Aarschot
    0%
  25. 25Gingelom
    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 Flanders, Belgium, PM2.5, August 2025, smogrank.com/be/region/flanders/history/2025-08 (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.