SmogRank / History / City race
Cities in Slovakia, 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 Slovakia for PM2.5 over the 30 days to 17 Aug 2024: Čaňa 15.6 µg/m³, Komárno 15.5 µg/m³ and Sereď 14.5 µg/m³.
- 1ČaňaKošice Region15.6
- 2KomárnoNitra Region15.5
- 3SereďTrnava Region14.5
- 4PúchovTrenčín Region13.9
- 5PrešovPrešov Region13.6
- 6NitraNitra Region12.9
- 7MartinŽilina Region12.5
- 8KrompachyKošice Region12.4
- 9BratislavaBratislava Region12.3
- 10PezinokBratislava Region12.1
- 11KošiceKošice Region11.9
- 12KolárovoNitra Region11.9
- 13HumennéPrešov Region11.7
- 14TrebišovKošice Region11.5
- 15ŽarnovicaBanská Bystrica Region11.5
- 16ŽilinaŽilina Region11.4
- 17TrnavaTrnava Region11.3
- 18SenicaTrnava Region11.3
- 19RužomberokŽilina Region11.2
- 20SenecBratislava Region11.1
+ 21 more cities, 11.0 µg/m³ and below
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.