SmogRank / Countries / Belgium / September 2025

Most polluted cities in Belgium, September 2025

35 cities in Belgium ranked by their average PM2.5 over the 30 days. Worst: Izegem at 8.1 µg/m³, #853 of 2,426 cities in the world. Cleanest: Jumet at 1.5. A city needs measurements on 70% of the days to be ranked.

  1. 1IzegemFlanders
    8.1
  2. 2EvergemFlanders
    6.5
  3. 3LochristiFlanders
    6.1
  4. 4RoeselareFlanders
    5.8
  5. 5StabroekFlanders
    5.7
  6. 6GenkFlanders
    5.6
  7. 7MenenFlanders
    5.4
  8. 7Knokke-HeistFlanders
    5.4
  9. 7GrimbergenFlanders
    5.4
  10. 10AntwerpFlanders
    5.3
  11. 11ZwijndrechtFlanders
    5.2
  12. 11HouthalenFlanders
    5.2
  13. 11GentFlanders
    5.2
  14. 14MonsWallonia
    5.1
  15. 14BeverenFlanders
    5.1
  16. 16MechelenFlanders
    5.0
  17. 16HasseltFlanders
    5.0
  18. 18MolFlanders
    4.9
  19. 18KoksijdeFlanders
    4.9
  20. 20ZaventemFlanders
    4.8
  21. 20MaldegemFlanders
    4.8
  22. 20AarschotFlanders
    4.8
  23. 23KapellenFlanders
    4.7
  24. 24KortrijkFlanders
    4.4
  25. 25WillebroekFlanders
    4.2
  26. 26BrusselsBrussels Capital
    4.1
  27. 27RixensartWallonia
    3.0
  28. 28Flémalle-HauteWallonia
    2.7
  29. 29TournaiWallonia
    2.6
  30. 29AnsWallonia
    2.6
  31. 31NamurWallonia
    2.5
  32. 31LiègeWallonia
    2.5
  33. 33CharleroiWallonia
    2.2
  34. 34AndenneWallonia
    1.8
  35. 35JumetWallonia
    1.5
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

All cities in the world, September 2025 · Belgium now

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SmogRank, most polluted cities in Belgium, PM2.5, September 2025, smogrank.com/be/history/2025-09 (accessed 2 Oct 2026).

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