SmogRank / Countries / The Netherlands / December 2025

Most polluted cities in The Netherlands, December 2025

29 cities in The Netherlands ranked by their average PM2.5 over the 31 days. Worst: Haarlem at 17.5 µg/m³, #401 of 2,360 cities in the world. Cleanest: Heerlen at 8.3. A city needs measurements on 70% of the days to be ranked.

  1. 1Haarlemlow-cost sensorsNorth Holland
    17.5
  2. 2SchiedamSouth Holland
    12.8
  3. 3EindhovenNorth Brabant
    12.5
  4. 4The HagueSouth Holland
    11.8
  5. 5BadhoevedorpNorth Holland
    11.6
  6. 6Velsen-ZuidNorth Holland
    11.5
  7. 6EnschedeOverijssel
    11.5
  8. 6VelserbroekNorth Holland
    11.5
  9. 9GroningenGroningen
    11.4
  10. 10IJsselsteinUtrecht
    11.3
  11. 11RidderkerkSouth Holland
    11.2
  12. 11BarneveldGelderland
    11.2
  13. 13UtrechtUtrecht
    11.0
  14. 14TilburgNorth Brabant
    10.8
  15. 15's-GravenzandeSouth Holland
    10.7
  16. 16RotterdamSouth Holland
    10.6
  17. 17BredaNorth Brabant
    10.5
  18. 18VenrayLimburg
    10.1
  19. 18VenloLimburg
    10.1
  20. 18AmsterdamNorth Holland
    10.1
  21. 21SpijkenisseSouth Holland
    10.0
  22. 22MedemblikNorth Holland
    9.7
  23. 22MaarssenUtrecht
    9.7
  24. 24ZaanstadNorth Holland
    9.5
  25. 24NijmegenGelderland
    9.5
  26. 26MaassluisSouth Holland
    9.4
  27. 27PurmerendNorth Holland
    8.7
  28. 28HillegomSouth Holland
    8.6
  29. 29HeerlenLimburg
    8.3
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, December 2025 · The Netherlands now

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SmogRank, most polluted cities in The Netherlands, PM2.5, December 2025, smogrank.com/nl/history/2025-12 (accessed 1 Oct 2026).

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