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 to14 Sep 2025 That day's board

The worst cities in The Netherlands for PM2.5 over the 30 days to 14 Sep 2025: Schiedam 7.0 µg/m³, Tilburg 6.7 µg/m³ and Badhoevedorp 6.2 µg/m³.

  1. 1SchiedamSouth Holland7.0
  2. 2TilburgNorth Brabant6.7
  3. 3BadhoevedorpNorth Holland6.2
  4. 4Velsen-ZuidNorth Holland5.5
  5. 5NoordwijkerhoutSouth Holland5.4
  6. 6HillegomSouth Holland5.4
  7. 7MedemblikNorth Holland5.2
  8. 8VenrayLimburg4.9
  9. 9VenloLimburg4.6
  10. 10RotterdamSouth Holland4.5
  11. 11BredaNorth Brabant4.5
  12. 12's-GravenzandeSouth Holland4.4
  13. 13ZwanenburgNorth Holland4.3
  14. 14The HagueSouth Holland4.3
  15. 15RidderkerkSouth Holland4.3
  16. 16AmsterdamNorth Holland4.3
  17. 17VelserbroekNorth Holland4.3
  18. 18UtrechtUtrecht4.1
  19. 19SpijkenisseSouth Holland4.1
  20. 20LunterenGelderland4.1

+ 14 more cities, 4.1 µg/m³ and below

Not counted on this day, too few days measured: Wormer since 10 Sep 2025 and Purmerend since 10 Sep 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.