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 to20 Nov 2023 That day's board

The worst cities in Slovakia for PM2.5 over the 30 days to 20 Nov 2023: Revúca 18.0 µg/m³, Čaňa 11.6 µg/m³ and Košice 10.7 µg/m³.

  1. 1RevúcaBanská Bystrica Region18.0
  2. 2ČaňaKošice Region11.6
  3. 3KošiceKošice Region10.7
  4. 4PrešovPrešov Region10.6
  5. 5HnúšťaBanská Bystrica Region9.5
  6. 6Vranov nad TopľouPrešov Region9.4
  7. 7ZvolenBanská Bystrica Region9.4
  8. 8RužomberokŽilina Region9.3
  9. 9PrievidzaTrenčín Region8.8
  10. 10MartinŽilina Region8.7
  11. 11Spišská Nová VesKošice Region8.6
  12. 12SmižanyKošice Region8.6
  13. 13HumennéPrešov Region8.6
  14. 14ŽilinaŽilina Region8.3
  15. 15TrenčínTrenčín Region8.1
  16. 16TrnavaTrnava Region7.8
  17. 17NitraNitra Region6.9
  18. 18SninaPrešov Region6.5
  19. 19HandlováTrenčín Region6.2
  20. 20BratislavaBratislava Region6.2

+ 7 more cities, 6.0 µg/m³ and below

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.