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 May 2026 That day's board

The worst cities in The Netherlands for PM2.5 over the 30 days to 9 May 2026: Schiedam 10.0 µg/m³, Waalre 9.3 µg/m³ and Eindhoven 9.3 µg/m³.

  1. 1SchiedamSouth Holland10.0
  2. 2WaalreNorth Brabant9.3
  3. 3EindhovenNorth Brabant9.3
  4. 4HaarlemNorth Holland9.1
  5. 5BadhoevedorpNorth Holland9.1
  6. 6TilburgNorth Brabant8.9
  7. 7GroningenGroningen8.9
  8. 8RotterdamSouth Holland8.4
  9. 9VenloLimburg8.3
  10. 10SpijkenisseSouth Holland8.1
  11. 11's-GravenzandeSouth Holland8.1
  12. 12RidderkerkSouth Holland8.1
  13. 13BredaNorth Brabant8.0
  14. 14Velsen-ZuidNorth Holland7.9
  15. 15MaassluisSouth Holland7.7
  16. 16LopikUtrecht7.7
  17. 17IJsselsteinUtrecht7.7
  18. 18MedemblikNorth Holland7.6
  19. 19NoordwijkerhoutSouth Holland7.4
  20. 20HillegomSouth Holland7.4

+ 17 more cities, 7.4 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.