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 to15 Aug 2025 That day's board

The worst cities in The Netherlands for PM2.5 over the 30 days to 15 Aug 2025: Schiedam 9.9 µg/m³, Venlo 8.7 µg/m³ and Badhoevedorp 8.5 µg/m³.

  1. 1SchiedamSouth Holland9.9
  2. 2VenloLimburg8.7
  3. 3BadhoevedorpNorth Holland8.5
  4. 4RidderkerkSouth Holland8.1
  5. 5TilburgNorth Brabant7.9
  6. 6's-GravenzandeSouth Holland7.8
  7. 7VenrayLimburg7.7
  8. 8ZwanenburgNorth Holland7.6
  9. 9RotterdamSouth Holland7.6
  10. 10VelserbroekNorth Holland7.6
  11. 11BredaNorth Brabant7.4
  12. 12SpijkenisseSouth Holland7.3
  13. 13MaassluisSouth Holland7.3
  14. 14Velsen-ZuidNorth Holland7.0
  15. 15AmsterdamNorth Holland7.0
  16. 16MedemblikNorth Holland6.9
  17. 17NoordwijkerhoutSouth Holland6.8
  18. 18HillegomSouth Holland6.8
  19. 19WaalreNorth Brabant6.7
  20. 20EindhovenNorth Brabant6.7

+ 16 more cities, 6.6 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.