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 11 Oct 2025: Celje 7.3 µg/m³, Ptuj 7.2 µg/m³ and Murska Sobota 7.2 µg/m³.
- 1CeljeUrban Municipality of Celje7.3
- 2PtujUrban Municipality of Ptuj7.2
- 3Murska SobotaUrban Municipality of Murska Sobota7.2
- 4MariborUrban Municipality of Maribor7.1
- 5LjubljanaLjubljana7.1
- 6Novo MestoUrban Municipality of Novo Mesto7.0
- 7KranjUrban Municipality of Kranj6.5
- 8Zagorje ob SaviMunicipality of Zagorje ob Savi6.3
- 9TrbovljeMunicipality of Trbovlje6.2
- 10Nova GoricaUrban Municipality of Nova Gorica5.3
- 11KoperUrban Municipality of Koper4.8
- 12KostelMunicipality of Kostel4.4
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.