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.

CountriesCities
The 30 days to26 Aug 2023 That day's board

The worst cities in Slovakia for PM2.5 over the 30 days to 26 Aug 2023: Humenné 14.9 µg/m³, Prešov 14.7 µg/m³ and Čaňa 13.7 µg/m³.

  1. 1HumennéPrešov Region14.9
  2. 2PrešovPrešov Region14.7
  3. 3ČaňaKošice Region13.7
  4. 4SenicaTrnava Region13.1
  5. 5Vranov nad TopľouPrešov Region13.0
  6. 6TrnavaTrnava Region12.9
  7. 7KošiceKošice Region12.7
  8. 8BratislavaBratislava Region12.6
  9. 9SninaPrešov Region11.5
  10. 10NitraNitra Region11.3
  11. 11Spišská Nová VesKošice Region11.2
  12. 12SmižanyKošice Region11.2
  13. 13MartinŽilina Region11.0
  14. 14ŽilinaŽilina Region10.7
  15. 15PartizánskeTrenčín Region10.5
  16. 16ZvolenBanská Bystrica Region10.0
  17. 17RevúcaBanská Bystrica Region9.7
  18. 18PrievidzaTrenčín Region9.4
  19. 19Žiar nad HronomBanská Bystrica Region9.1
  20. 20KolárovoNitra Region9.1

+ 7 more cities, the next at 8.9 µg/m³

30 days7 days
GoodModerateSensitive groupsUnhealthyVery unhealthyHazardousWHO 24-hour guideline, 15 µg/m³Fades where it stood: not counted that 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.