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.
The worst cities in The Netherlands for PM2.5 over the 30 days to 9 Jun 2025: Schiedam 8.2 µg/m³, The Hague 7.8 µg/m³ and Medemblik 7.3 µg/m³.
- 1SchiedamSouth Holland8.2
- 2The HagueSouth Holland7.8
- 3MedemblikNorth Holland7.3
- 4Velsen-ZuidNorth Holland7.0
- 5ZwanenburgNorth Holland6.9
- 6VenloLimburg6.9
- 7VelserbroekNorth Holland6.9
- 8's-GravenzandeSouth Holland6.8
- 9NoordwijkerhoutSouth Holland6.7
- 10HillegomSouth Holland6.7
- 11BadhoevedorpNorth Holland6.7
- 12VenrayLimburg6.6
- 13RotterdamSouth Holland6.6
- 14AmsterdamNorth Holland6.6
- 15RidderkerkSouth Holland6.5
- 16TilburgNorth Brabant6.3
- 17SpijkenisseSouth Holland6.2
- 18MaassluisSouth Holland5.8
- 19BredaNorth Brabant5.8
- 20ZaanstadNorth Holland5.7
+ 14 more cities, 5.4 µg/m³ and below
Not counted on this day, too few days measured: Wormer since 22 Apr 2025 and Purmerend since 22 Apr 2025.
Cities counted each 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.