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 4 Jun 2026: Schiedam 8.9 µg/m³, Haarlem 8.6 µg/m³ and 's-Gravenzande 8.2 µg/m³.
- 1SchiedamSouth Holland8.9
- 2HaarlemNorth Holland8.6
- 3's-GravenzandeSouth Holland8.2
- 4Velsen-ZuidNorth Holland7.8
- 5TilburgNorth Brabant7.7
- 6RidderkerkSouth Holland7.7
- 7WaalreNorth Brabant7.6
- 8EindhovenNorth Brabant7.6
- 9MaassluisSouth Holland7.4
- 10BredaNorth Brabant7.3
- 11SpijkenisseSouth Holland7.2
- 12NoordwijkerhoutSouth Holland7.2
- 13MedemblikNorth Holland7.2
- 14HillegomSouth Holland7.2
- 15RotterdamSouth Holland7.1
- 16BadhoevedorpNorth Holland7.1
- 17ZwanenburgNorth Holland6.8
- 18VelserbroekNorth Holland6.8
- 19ZaanstadNorth Holland6.7
- 20The HagueSouth Holland6.7
+ 16 more cities, 6.6 µg/m³ and below
Not counted on this day, too few days measured: Venray since 15 May 2026.
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.