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 to24 Jun 2023 That day's board

The worst cities in Slovakia for PM2.5 over the 30 days to 24 Jun 2023: Čaňa 20.8 µg/m³, Trnava 15.6 µg/m³ and Prešov 15.1 µg/m³.

  1. 1ČaňaKošice Region20.8
  2. 2TrnavaTrnava Region15.6
  3. 3PrešovPrešov Region15.1
  4. 4SenicaTrnava Region14.9
  5. 5KošiceKošice Region14.1
  6. 6MartinŽilina Region13.7
  7. 7HumennéPrešov Region13.6
  8. 8Spišská Nová VesKošice Region13.1
  9. 9SmižanyKošice Region13.1
  10. 10NitraNitra Region12.7
  11. 11BratislavaBratislava Region12.3
  12. 12RužomberokŽilina Region12.0
  13. 13ŽilinaŽilina Region11.8
  14. 14KolárovoNitra Region11.5
  15. 15Vranov nad TopľouPrešov Region11.2
  16. 16ZvolenBanská Bystrica Region10.7
  17. 17Veľká LomnicaPrešov Region10.4
  18. 18PartizánskeTrenčín Region10.3
  19. 19Žiar nad HronomBanská Bystrica Region10.0
  20. 20Banská BystricaBanská Bystrica Region9.9

+ 6 more cities, 9.8 µg/m³ and below

Not counted on this day, too few days measured: Trenčín since 28 May 2023.

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 readers for them. Most cities there are missing from this board, not clean. Why.