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 22 Oct 2023: Čaňa 15.9 µg/m³, Trnava 13.5 µg/m³ and Revúca 13.4 µg/m³.
- 1ČaňaKošice Region15.9
- 2TrnavaTrnava Region13.5
- 3RevúcaBanská Bystrica Region13.4
- 4HumennéPrešov Region12.9
- 5KolárovoNitra Region12.7
- 6KošiceKošice Region12.3
- 7MartinŽilina Region12.3
- 8PrešovPrešov Region12.0
- 9Spišská Nová VesKošice Region11.2
- 10SmižanyKošice Region11.2
- 11NitraNitra Region10.9
- 12SenicaTrnava Region10.8
- 13ŽilinaŽilina Region10.7
- 14Vranov nad TopľouPrešov Region10.5
- 15TrenčínTrenčín Region10.4
- 16RužomberokŽilina Region10.0
- 17SninaPrešov Region9.6
- 18PrievidzaTrenčín Region9.5
- 19ZvolenBanská Bystrica Region9.4
- 20BratislavaBratislava Region9.4
+ 7 more cities, 8.8 µg/m³ and below
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 readers for them. Most cities there are missing from this board, not clean. Why.