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 to5 Apr 2026 That day's board

The worst cities in The Netherlands for PM2.5 over the 30 days to 5 Apr 2026: Haarlem 17.6 µg/m³, Schiedam 15.5 µg/m³ and 's-Gravenzande 14.5 µg/m³.

  1. 1HaarlemNorth Holland17.6
  2. 2SchiedamSouth Holland15.5
  3. 3's-GravenzandeSouth Holland14.5
  4. 4The HagueSouth Holland14.5
  5. 5WaalreNorth Brabant14.4
  6. 6EindhovenNorth Brabant14.4
  7. 7RotterdamSouth Holland14.2
  8. 8RidderkerkSouth Holland14.2
  9. 9TilburgNorth Brabant13.9
  10. 10SpijkenisseSouth Holland13.8
  11. 11Velsen-ZuidNorth Holland13.7
  12. 12MaassluisSouth Holland13.6
  13. 13AmsterdamNorth Holland13.6
  14. 14UtrechtUtrecht13.5
  15. 15BredaNorth Brabant13.3
  16. 16MaarssenUtrecht13.2
  17. 17GroningenGroningen13.2
  18. 18BreukelenUtrecht13.2
  19. 19ZwanenburgNorth Holland13.1
  20. 20ZaanstadNorth Holland13.1

+ 17 more cities, 13.1 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.