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 5 May 2026: Schiedam 10.3 µg/m³, Badhoevedorp 9.3 µg/m³ and Groningen 9.2 µg/m³.
- 1SchiedamSouth Holland10.3
- 2BadhoevedorpNorth Holland9.3
- 3GroningenGroningen9.2
- 4WaalreNorth Brabant9.1
- 5TilburgNorth Brabant9.1
- 6EindhovenNorth Brabant9.1
- 7HaarlemNorth Holland9.0
- 8RotterdamSouth Holland8.5
- 9's-GravenzandeSouth Holland8.4
- 10Velsen-ZuidNorth Holland8.3
- 11SpijkenisseSouth Holland8.1
- 12RidderkerkSouth Holland8.1
- 13BredaNorth Brabant8.0
- 14VenloLimburg7.9
- 15LopikUtrecht7.9
- 16IJsselsteinUtrecht7.9
- 17MedemblikNorth Holland7.8
- 18The HagueSouth Holland7.7
- 19NoordwijkerhoutSouth Holland7.7
- 20MaassluisSouth Holland7.7
+ 17 more cities, 7.7 µg/m³ and below
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.