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 23 Aug 2023: Humenné 14.2 µg/m³, Prešov 13.9 µg/m³ and Čaňa 13.3 µg/m³.
- 1HumennéPrešov Region14.2
- 2PrešovPrešov Region13.9
- 3ČaňaKošice Region13.3
- 4Vranov nad TopľouPrešov Region12.6
- 5KošiceKošice Region12.2
- 6TrnavaTrnava Region12.2
- 7SenicaTrnava Region12.1
- 8BratislavaBratislava Region11.6
- 9SninaPrešov Region11.1
- 10Spišská Nová VesKošice Region10.7
- 11SmižanyKošice Region10.7
- 12NitraNitra Region10.5
- 13MartinŽilina Region10.5
- 14ŽilinaŽilina Region10.1
- 15PartizánskeTrenčín Region9.9
- 16ZvolenBanská Bystrica Region9.7
- 17RevúcaBanská Bystrica Region9.2
- 18PrievidzaTrenčín Region9.0
- 19Žiar nad HronomBanská Bystrica Region8.8
- 20KolárovoNitra Region8.5
+ 7 more cities, 8.4 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.