SmogRank / History / City race
Cities, 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 for PM2.5 over the 7 days to 22 Feb 2023: Strumica 67.1 µg/m³, Banja Luka 66.1 µg/m³ and Tetovo 64.6 µg/m³.
- 1StrumicaNorth Macedonia67.1
- 2Banja LukaBosnia and Herzegovina66.1
- 3TetovoNorth Macedonia64.6
- 4MariglianoItaly64.4
- 5SkopjeNorth Macedonia60.8
- 6PrilepNorth Macedonia58.3
- 7KavadarciNorth Macedonia56.1
- 8GjilanKosovo54.7
- 9GostivarNorth Macedonia51.4
- 10KoperSlovenia49.6
- 11KranjSlovenia46.4
- 12GevgelijaNorth Macedonia45.4
- 13KorçëAlbania44.7
- 14IlindenNorth Macedonia42.6
- 15KoprivnicaCroatia42.6
- 16BelgradeSerbia41.7
- 17LjubljanaSlovenia41.3
- 18Novo MestoSlovenia40.2
- 19OhridNorth Macedonia39.4
- 20CeljeSlovenia38.2
+ 1,175 more cities, 37.8 µg/m³ and below
Not counted on this day, too few days measured: Pátra since 22 Feb 2023, Pesaro since 19 Feb 2023, Codlea since 17 Feb 2023 and 53 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 readers for them. Most cities there are missing from this board, not clean. Why.