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 8 Feb 2026: Murska Sobota 34.4 µg/m³, Ptuj 33.0 µg/m³ and Novo Mesto 27.4 µg/m³.
- 1Murska SobotaUrban Municipality of Murska Sobota34.4
- 2PtujUrban Municipality of Ptuj33.0
- 3Novo MestoUrban Municipality of Novo Mesto27.4
- 4MariborUrban Municipality of Maribor25.6
- 5CeljeUrban Municipality of Celje23.5
- 6LjubljanaLjubljana21.5
- 7Nova GoricaUrban Municipality of Nova Gorica20.3
- 8Zagorje ob SaviMunicipality of Zagorje ob Savi19.8
- 9KranjUrban Municipality of Kranj18.9
- 10TrbovljeMunicipality of Trbovlje18.6
- 11KoperUrban Municipality of Koper16.0
- 12KostelMunicipality of Kostel10.0
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.