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 to17 Jul 2024 That day's board

The worst cities in Slovakia for PM2.5 over the 30 days to 17 Jul 2024: Púchov 20.2 µg/m³, Čaňa 19.1 µg/m³ and Komárno 18.9 µg/m³.

  1. 1PúchovTrenčín Region20.2
  2. 2ČaňaKošice Region19.1
  3. 3KomárnoNitra Region18.9
  4. 4HumennéPrešov Region16.9
  5. 5KrompachyKošice Region16.7
  6. 6NitraNitra Region16.5
  7. 7PrešovPrešov Region16.2
  8. 8SereďTrnava Region15.4
  9. 9KošiceKošice Region15.0
  10. 10TrebišovKošice Region14.8
  11. 11ŽarnovicaBanská Bystrica Region14.3
  12. 12SenecBratislava Region14.2
  13. 13PezinokBratislava Region14.1
  14. 14TrenčínTrenčín Region13.6
  15. 15Vranov nad TopľouPrešov Region13.5
  16. 16Liptovský Mikulᚎilina Region13.5
  17. 17TrnavaTrnava Region13.4
  18. 18LučenecBanská Bystrica Region13.4
  19. 19RužomberokŽilina Region13.3
  20. 20KolárovoNitra Region13.2

+ 21 more cities, 13.1 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.