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 9 Apr 2026: Ptuj 11.2 µg/m³, Murska Sobota 10.2 µg/m³ and Celje 10.2 µg/m³.
- 1PtujUrban Municipality of Ptuj11.2
- 2Murska SobotaUrban Municipality of Murska Sobota10.2
- 3CeljeUrban Municipality of Celje10.2
- 4Zagorje ob SaviMunicipality of Zagorje ob Savi10.1
- 5Novo MestoUrban Municipality of Novo Mesto9.4
- 6KranjUrban Municipality of Kranj8.9
- 7LjubljanaLjubljana8.8
- 8Nova GoricaUrban Municipality of Nova Gorica8.6
- 9MariborUrban Municipality of Maribor8.4
- 10TrbovljeMunicipality of Trbovlje8.2
- 11KoperUrban Municipality of Koper7.7
- 12KostelMunicipality of Kostel5.4
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.