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 25 Apr 2023: 's-Gravenzande 10.6 µg/m³, Hillegom 10.3 µg/m³ and Noordwijkerhout 10.1 µg/m³.
- 1's-GravenzandeSouth Holland10.6
- 2HillegomSouth Holland10.3
- 3NoordwijkerhoutSouth Holland10.1
- 4PurmerendNorth Holland10.0
- 5WormerNorth Holland9.9
- 6Velsen-ZuidNorth Holland9.9
- 7WaalreNorth Brabant9.8
- 8RotterdamSouth Holland9.7
- 9EindhovenNorth Brabant9.7
- 10MaassluisSouth Holland9.6
- 11RidderkerkSouth Holland9.5
- 12AmsterdamNorth Holland9.4
- 13ZaanstadNorth Holland9.3
- 14UtrechtUtrecht8.9
- 15VenrayLimburg8.8
- 16The HagueSouth Holland8.8
- 17GroningenGroningen8.6
- 18IJsselsteinUtrecht8.4
- 19BadhoevedorpNorth Holland8.4
- 20LopikUtrecht8.2
+ 11 more cities, 8.1 µg/m³ and below
Not counted on this day, too few days measured: Spijkenisse since 30 Mar 2023, Velserbroek since 30 Mar 2023, Venlo since 28 Mar 2023 and Schiedam since 25 Mar 2023. 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 readers for them. Most cities there are missing from this board, not clean. Why.