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 28 May 2023: Čaňa 22.8 µg/m³, Revúca 14.3 µg/m³ and Prešov 14.0 µg/m³.
- 1ČaňaKošice Region22.8
- 2RevúcaBanská Bystrica Region14.3
- 3PrešovPrešov Region14.0
- 4TrnavaTrnava Region12.9
- 5HumennéPrešov Region12.6
- 6SenicaTrnava Region12.6
- 7Spišská Nová VesKošice Region12.4
- 8SmižanyKošice Region12.4
- 9KošiceKošice Region12.2
- 10Vranov nad TopľouPrešov Region11.4
- 11MartinŽilina Region11.0
- 12ŽilinaŽilina Region10.8
- 13KolárovoNitra Region10.6
- 14BratislavaBratislava Region10.3
- 15NitraNitra Region9.9
- 16SninaPrešov Region9.8
- 17RužomberokŽilina Region9.6
- 18HandlováTrenčín Region9.3
- 19ZvolenBanská Bystrica Region9.1
- 20Karlova VesBratislava Region8.9
+ 6 more cities, the next at 8.4 µg/m³
Not counted on this day, too few days measured: Trenčín since 28 May 2023, Trebišov since 30 Mar 2023, Poprad since 30 Mar 2023 and 8 more cities.
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 reader for China's network. Turkey's network doesn't answer requests from outside the country, so we can't read it. Most cities there are missing from this board, not clean. Why.