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 30 days to 2 Mar 2023: Banja Luka 62.9 µg/m³, Strumica 53.7 µg/m³ and Tetovo 47.1 µg/m³.
- 1Banja LukaBosnia and Herzegovina62.9
- 2StrumicaNorth Macedonia53.7
- 3TetovoNorth Macedonia47.1
- 4SkopjeNorth Macedonia46.8
- 5PrilepNorth Macedonia45.8
- 6MariglianoItaly45.7
- 7KavadarciNorth Macedonia45.4
- 8GevgelijaNorth Macedonia43.9
- 9GostivarNorth Macedonia40.7
- 10Novo MestoSlovenia40.5
- 11RadomskoPoland38.8
- 12KranjSlovenia36.2
- 13Spišská Nová VesSlovakia35.2
- 14KoprivnicaCroatia34.4
- 15RužomberokSlovakia34.1
- 16LjubljanaSlovenia33.6
- 17KorçëAlbania33.3
- 18BihaćBosnia and Herzegovina32.9
- 19Bielsko-BialaPoland32.8
- 20BitolaNorth Macedonia32.5
+ 1,207 more cities, the next at 32.4 µg/m³
Not counted on this day, too few days measured: Ashgabat since 6 Feb 2023, Kigali since 6 Feb 2023, Addis Ababa since 6 Feb 2023 and 60 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, Turkey and Iran, which publish only on their own websites. We are building the reader for China's network. The networks of Turkey and Iran don't answer requests from outside their countries, so we can't read them. Most cities there are missing from this board, not clean. Why.