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.
The worst cities in Slovakia for PM2.5 over the 30 days to 24 Nov 2023: Revúca 19.3 µg/m³, Čaňa 12.3 µg/m³ and Košice 11.3 µg/m³.
- 1RevúcaBanská Bystrica Region19.3
- 2ČaňaKošice Region12.3
- 3KošiceKošice Region11.3
- 4PrešovPrešov Region11.1
- 5HnúšťaBanská Bystrica Region10.3
- 6ZvolenBanská Bystrica Region10.1
- 7Vranov nad TopľouPrešov Region10.0
- 8PrievidzaTrenčín Region10.0
- 9RužomberokŽilina Region9.4
- 10HumennéPrešov Region9.2
- 11Spišská Nová VesKošice Region9.0
- 12SmižanyKošice Region9.0
- 13MartinŽilina Region8.9
- 14ŽilinaŽilina Region8.4
- 15TrenčínTrenčín Region8.2
- 16TrnavaTrnava Region7.9
- 17NitraNitra Region7.5
- 18HandlováTrenčín Region7.2
- 19PartizánskeTrenčín Region7.1
- 20Banská BystricaBanská Bystrica Region6.8
+ 7 more cities, the next at 6.7 µg/m³
Cities counted each 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.