SmogRank / History / City race
Cities in Slovenia, 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 Slovenia for PM2.5 over the 30 days to 24 Feb 2023: Novo Mesto 45.3 µg/m³, Kranj 40.0 µg/m³ and Ljubljana 38.7 µg/m³.
- 1Novo MestoUrban Municipality of Novo Mesto45.3
- 2KranjUrban Municipality of Kranj40.0
- 3LjubljanaLjubljana38.7
- 4TrbovljeMunicipality of Trbovlje37.6
- 5CeljeUrban Municipality of Celje35.8
- 6KoperUrban Municipality of Koper34.4
- 7PtujUrban Municipality of Ptuj32.3
- 8MariborUrban Municipality of Maribor20.6
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.