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 Jul 2025 That day's board

The worst cities in The Netherlands for PM2.5 over the 30 days to 9 Jul 2025: Medemblik 8.5 µg/m³, Noordwijkerhout 8.3 µg/m³ and Hillegom 8.3 µg/m³.

  1. 1MedemblikNorth Holland8.5
  2. 2NoordwijkerhoutSouth Holland8.3
  3. 3HillegomSouth Holland8.3
  4. 4's-GravenzandeSouth Holland7.7
  5. 5SchiedamSouth Holland7.7
  6. 6BadhoevedorpNorth Holland7.7
  7. 7VenrayLimburg7.6
  8. 8The HagueSouth Holland7.6
  9. 9TilburgNorth Brabant7.4
  10. 10ZwanenburgNorth Holland7.3
  11. 11RotterdamSouth Holland7.3
  12. 12VelserbroekNorth Holland7.3
  13. 13BredaNorth Brabant7.1
  14. 14Velsen-ZuidNorth Holland7.0
  15. 15VenloLimburg6.8
  16. 16AmsterdamNorth Holland6.7
  17. 17SpijkenisseSouth Holland6.4
  18. 18LunterenGelderland6.4
  19. 19BarneveldGelderland6.4
  20. 20MaassluisSouth Holland6.3

+ 13 more cities, 6.3 µg/m³ and below

Not counted on this day, too few days measured: Ridderkerk since 22 Jun 2025.

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.