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 to15 Nov 2024 That day's board

The worst cities in Slovakia for PM2.5 over the 30 days to 15 Nov 2024: Šahy 34.9 µg/m³, Čaňa 31.3 µg/m³ and Revúca 30.0 µg/m³.

  1. 1ŠahyNitra Region34.9
  2. 2ČaňaKošice Region31.3
  3. 3RevúcaBanská Bystrica Region30.0
  4. 4PúchovTrenčín Region29.1
  5. 5ŽarnovicaBanská Bystrica Region28.7
  6. 6KrompachyKošice Region27.1
  7. 7LučenecBanská Bystrica Region26.7
  8. 8ŽilinaŽilina Region25.5
  9. 9MartinŽilina Region25.1
  10. 10PrešovPrešov Region25.0
  11. 11OščadnicaŽilina Region24.3
  12. 12ČadcaŽilina Region24.3
  13. 13RužomberokŽilina Region24.1
  14. 14KošiceKošice Region22.3
  15. 15TrenčínTrenčín Region20.5
  16. 16HumennéPrešov Region20.3
  17. 17PezinokBratislava Region20.2
  18. 18NitraNitra Region20.2
  19. 19KomárnoNitra Region20.1
  20. 20HandlováTrenčín Region20.0

+ 21 more cities, 19.9 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.