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 to9 Apr 2026 That day's board

The worst cities in The Netherlands for PM2.5 over the 30 days to 9 Apr 2026: Schiedam 12.6 µg/m³, Haarlem 11.6 µg/m³ and Waalre 11.5 µg/m³.

  1. 1SchiedamSouth Holland12.6
  2. 2HaarlemNorth Holland11.6
  3. 3WaalreNorth Brabant11.5
  4. 4EindhovenNorth Brabant11.5
  5. 5TilburgNorth Brabant11.3
  6. 6's-GravenzandeSouth Holland11.3
  7. 7The HagueSouth Holland11.3
  8. 8Velsen-ZuidNorth Holland11.0
  9. 9RotterdamSouth Holland10.5
  10. 10MedemblikNorth Holland10.3
  11. 11GroningenGroningen10.2
  12. 12SpijkenisseSouth Holland10.1
  13. 13NoordwijkerhoutSouth Holland10.1
  14. 14MaassluisSouth Holland10.1
  15. 15HillegomSouth Holland10.1
  16. 16UtrechtUtrecht10.0
  17. 17LopikUtrecht10.0
  18. 18IJsselsteinUtrecht10.0
  19. 19BredaNorth Brabant10.0
  20. 20BadhoevedorpNorth Holland10.0

+ 17 more cities, 9.9 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.