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 to21 Dec 2023 That day's board

The worst cities in Slovakia for PM2.5 over the 30 days to 21 Dec 2023: Revúca 37.6 µg/m³, Spišská Nová Ves 28.5 µg/m³ and Smižany 28.5 µg/m³.

  1. 1RevúcaBanská Bystrica Region37.6
  2. 2Spišská Nová VesKošice Region28.5
  3. 3SmižanyKošice Region28.5
  4. 4ŽilinaŽilina Region24.7
  5. 5HnúšťaBanská Bystrica Region23.8
  6. 6ČaňaKošice Region23.6
  7. 7HumennéPrešov Region23.4
  8. 8MartinŽilina Region22.9
  9. 9RužomberokŽilina Region22.1
  10. 10PrešovPrešov Region21.1
  11. 11PrievidzaTrenčín Region20.9
  12. 12ZvolenBanská Bystrica Region20.7
  13. 13Banská BystricaBanská Bystrica Region20.5
  14. 14KošiceKošice Region20.3
  15. 15PartizánskeTrenčín Region20.2
  16. 16HandlováTrenčín Region18.4
  17. 17Vranov nad TopľouPrešov Region18.3
  18. 18TrenčínTrenčín Region17.3
  19. 19KolárovoNitra Region16.9
  20. 20TrnavaTrnava Region16.5

+ 7 more cities, 15.7 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.