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 Dec 2023 That day's board

The worst cities in Slovakia for PM2.5 over the 30 days to 20 Dec 2023: Revúca 37.2 µg/m³, Spišská Nová Ves 28.2 µg/m³ and Smižany 28.2 µg/m³.

  1. 1RevúcaBanská Bystrica Region37.2
  2. 2Spišská Nová VesKošice Region28.2
  3. 3SmižanyKošice Region28.2
  4. 4ŽilinaŽilina Region25.5
  5. 5ČaňaKošice Region23.6
  6. 6HnúšťaBanská Bystrica Region23.6
  7. 7MartinŽilina Region23.2
  8. 8HumennéPrešov Region23.1
  9. 9RužomberokŽilina Region22.3
  10. 10PrievidzaTrenčín Region21.2
  11. 11PrešovPrešov Region21.0
  12. 12ZvolenBanská Bystrica Region20.9
  13. 13Banská BystricaBanská Bystrica Region20.8
  14. 14KošiceKošice Region20.5
  15. 15PartizánskeTrenčín Region20.5
  16. 16HandlováTrenčín Region19.1
  17. 17Vranov nad TopľouPrešov Region18.4
  18. 18TrenčínTrenčín Region17.4
  19. 19KolárovoNitra Region16.4
  20. 20TrnavaTrnava Region16.3

+ 7 more cities, 15.9 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.