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 23 Jan 2024: Revúca 43.0 µg/m³, Spišská Nová Ves 33.4 µg/m³ and Smižany 33.4 µg/m³.
- 1RevúcaBanská Bystrica Region43.0
- 2Spišská Nová VesKošice Region33.4
- 3SmižanyKošice Region33.4
- 4ČaňaKošice Region29.3
- 5HumennéPrešov Region24.9
- 6HnúšťaBanská Bystrica Region24.0
- 7KošiceKošice Region23.1
- 8Vranov nad TopľouPrešov Region22.5
- 9ŽilinaŽilina Region22.2
- 10PrešovPrešov Region21.3
- 11RužomberokŽilina Region21.0
- 12PrievidzaTrenčín Region19.3
- 13TrnavaTrnava Region18.6
- 14TrenčínTrenčín Region18.4
- 15MartinŽilina Region18.2
- 16KolárovoNitra Region18.1
- 17ZvolenBanská Bystrica Region17.4
- 18NitraNitra Region17.4
- 19SenicaTrnava Region17.2
- 20PartizánskeTrenčín Region16.4
+ 7 more cities, the next at 16.2 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.