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 to27 Feb 2023 That day's board

The worst cities in Slovakia for PM2.5 over the 30 days to 27 Feb 2023: Spišská Nová Ves 35.6 µg/m³, Ružomberok 32.6 µg/m³ and Čadca 28.4 µg/m³.

  1. 1Spišská Nová VesKošice Region35.6
  2. 2RužomberokŽilina Region32.6
  3. 3ČadcaŽilina Region28.4
  4. 4LučenecBanská Bystrica Region26.9
  5. 5HumennéPrešov Region25.6
  6. 6TrebišovKošice Region25.5
  7. 7KošiceKošice Region25.0
  8. 8PrešovPrešov Region24.9
  9. 9MartinŽilina Region24.9
  10. 10ŽilinaŽilina Region24.1
  11. 11Liptovský Mikulᚎilina Region23.6
  12. 12BardejovPrešov Region22.9
  13. 13Banská BystricaBanská Bystrica Region22.3
  14. 14PúchovTrenčín Region22.2
  15. 15Vranov nad TopľouPrešov Region21.6
  16. 16ZvolenBanská Bystrica Region19.8
  17. 17TrenčínTrenčín Region19.1
  18. 18PrievidzaTrenčín Region18.6
  19. 19PartizánskeTrenčín Region18.4
  20. 20MalackyBratislava Region18.0

+ 13 more cities, the next at 17.5 µg/m³

Not counted on this day, too few days measured: Veľká Lomnica since 3 Feb 2023, Smižany since 3 Feb 2023, Kolárovo since 3 Feb 2023 and Hnúšťa since 3 Feb 2023. Days missing from the source archive fall in this window, so fewer countries are counted.

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.