SmogRank / History / City race

Cities in The Netherlands, worst air first, day by day

Each measured city's average over the 30 days to every day since January 2023, worst first. Find your own city to follow it through the race, or keep to one country.

CountriesCities
The 30 days to13 Nov 2025 That day's board

The worst cities in The Netherlands for PM2.5 over the 30 days to 13 Nov 2025: Schiedam 8.1 µg/m³, Haarlem 8.0 µg/m³ and Velsen-Zuid 7.7 µg/m³.

  1. 1SchiedamSouth Holland8.1
  2. 2HaarlemNorth Holland8.0
  3. 3Velsen-ZuidNorth Holland7.7
  4. 4WaalreNorth Brabant7.0
  5. 5EindhovenNorth Brabant7.0
  6. 6BadhoevedorpNorth Holland7.0
  7. 7BredaNorth Brabant6.8
  8. 8UtrechtUtrecht6.5
  9. 9NoordwijkerhoutSouth Holland6.4
  10. 10HillegomSouth Holland6.4
  11. 11GroningenGroningen6.3
  12. 12EnschedeOverijssel6.3
  13. 13The HagueSouth Holland6.2
  14. 14RotterdamSouth Holland6.2
  15. 15LunterenGelderland6.1
  16. 16BarneveldGelderland6.1
  17. 17ZwanenburgNorth Holland6.0
  18. 18VenloLimburg6.0
  19. 19's-GravenzandeSouth Holland6.0
  20. 20VelserbroekNorth Holland6.0

+ 17 more cities, 5.9 µg/m³ and below

30 days7 days
GoodModerateSensitive groupsUnhealthyVery unhealthyHazardousWHO 24-hour guideline, 15 µg/m³Fades where it stood: not counted that day

A city's number is its average over the 30 days, shown only when 21 of them were measured (5 of 7 on the 7-day race), the same minimum as the 30- and 7-day boards. A city whose monitors go quiet fades out where it stood rather than sliding down, so a gap never reads as cleaner air. Some large countries are thin or missing because their monitors' licences don't allow reuse. How we rank.

Not covered: the government monitoring networks of China and Turkey, which publish only on their own websites; we are building the readers for them. Most cities there are missing from this board, not clean. Why.