SmogRank / Countries / The Netherlands / January 2026

Most polluted cities in The Netherlands, January 2026

29 cities in The Netherlands ranked by their average PM2.5 over the 31 days. Worst: Haarlem at 29.1 µg/m³, #134 of 2,047 cities in the world. Cleanest: Heerlen at 11.8. A city needs measurements on 70% of the days to be ranked.

  1. 1Haarlemlow-cost sensorsNorth Holland
    29.1
  2. 2GroningenGroningen
    19.6
  3. 3SchiedamSouth Holland
    19.3
  4. 4BadhoevedorpNorth Holland
    18.4
  5. 5Velsen-ZuidNorth Holland
    18.3
  6. 6MedemblikNorth Holland
    17.9
  7. 7The HagueSouth Holland
    17.8
  8. 8IJsselsteinUtrecht
    17.7
  9. 9RidderkerkSouth Holland
    17.6
  10. 9VelserbroekNorth Holland
    17.6
  11. 11UtrechtUtrecht
    17.5
  12. 12PurmerendNorth Holland
    17.4
  13. 13BarneveldGelderland
    17.0
  14. 14EindhovenNorth Brabant
    16.9
  15. 15's-GravenzandeSouth Holland
    16.8
  16. 15AmsterdamNorth Holland
    16.8
  17. 17ZaanstadNorth Holland
    16.7
  18. 18RotterdamSouth Holland
    16.6
  19. 19EnschedeOverijssel
    16.3
  20. 20VenloLimburg
    16.2
  21. 20MaarssenUtrecht
    16.2
  22. 22SpijkenisseSouth Holland
    16.1
  23. 23NijmegenGelderland
    16.0
  24. 24MaassluisSouth Holland
    15.7
  25. 25TilburgNorth Brabant
    15.5
  26. 26HillegomSouth Holland
    15.3
  27. 27BredaNorth Brabant
    15.1
  28. 28VenrayLimburg
    13.8
  29. 29HeerlenLimburg
    11.8
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, January 2026 · The Netherlands now