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 19 Feb 2023: Strumica 80.8 µg/m³, Tetovo 73.3 µg/m³ and Skopje 71.0 µg/m³.
- 1StrumicaNorth Macedonia80.8
- 2TetovoNorth Macedonia73.3
- 3SkopjeNorth Macedonia71.0
- 4KavadarciNorth Macedonia69.0
- 5PrilepNorth Macedonia64.5
- 6Banja LukaBosnia and Herzegovina62.8
- 7MariglianoItaly58.8
- 8GostivarNorth Macedonia58.1
- 9GevgelijaNorth Macedonia56.3
- 10IlindenNorth Macedonia52.7
- 11Las Palmas de Gran CanariaSpain51.9
- 12BelgradeSerbia49.6
- 13KorçëAlbania47.6
- 14KoprivnicaCroatia46.9
- 15KranjSlovenia46.2
- 16KoperSlovenia45.0
- 17Novo MestoSlovenia44.1
- 18KochaniNorth Macedonia43.5
- 19LjubljanaSlovenia43.4
- 20Spišská Nová VesSlovakia42.0
+ 1,161 more cities, 41.0 µg/m³ and below
Not counted on this day, too few days measured: Pesaro since 19 Feb 2023, Codlea since 17 Feb 2023, Jasło since 16 Feb 2023 and 57 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.