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 28 Apr 2023: 's-Gravenzande 10.9 µg/m³, Hillegom 10.5 µg/m³ and Purmerend 10.2 µg/m³.
- 1's-GravenzandeSouth Holland10.9
- 2HillegomSouth Holland10.5
- 3PurmerendNorth Holland10.2
- 4NoordwijkerhoutSouth Holland10.2
- 5WaalreNorth Brabant10.0
- 6Velsen-ZuidNorth Holland9.9
- 7RotterdamSouth Holland9.9
- 8MaassluisSouth Holland9.9
- 9EindhovenNorth Brabant9.8
- 10RidderkerkSouth Holland9.7
- 11ZaanstadNorth Holland9.4
- 12AmsterdamNorth Holland9.4
- 13UtrechtUtrecht9.1
- 14The HagueSouth Holland9.1
- 15VenrayLimburg8.9
- 16IJsselsteinUtrecht8.6
- 17GroningenGroningen8.6
- 18BadhoevedorpNorth Holland8.6
- 19TilburgNorth Brabant8.5
- 20LopikUtrecht8.3
+ 10 more cities, the next at 8.3 µg/m³
Not counted on this day, too few days measured: Wormer since 28 Apr 2023, Spijkenisse since 30 Mar 2023, Velserbroek since 30 Mar 2023 and 2 more cities. Days missing from the source archive fall in this window, so fewer countries are counted.
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 reader for China's network. Turkey's network doesn't answer requests from outside the country, so we can't read it. Most cities there are missing from this board, not clean. Why.