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 Dec 2023: Revúca 37.7 µg/m³, Spišská Nová Ves 29.4 µg/m³ and Smižany 29.4 µg/m³.
- 1RevúcaBanská Bystrica Region37.7
- 2Spišská Nová VesKošice Region29.4
- 3SmižanyKošice Region29.4
- 4ŽilinaŽilina Region23.9
- 5HumennéPrešov Region23.3
- 6HnúšťaBanská Bystrica Region23.1
- 7RužomberokŽilina Region22.9
- 8ČaňaKošice Region22.4
- 9MartinŽilina Region22.2
- 10PrešovPrešov Region20.5
- 11PrievidzaTrenčín Region20.4
- 12Banská BystricaBanská Bystrica Region20.1
- 13PartizánskeTrenčín Region19.7
- 14KošiceKošice Region19.6
- 15ZvolenBanská Bystrica Region19.4
- 16HandlováTrenčín Region17.9
- 17Vranov nad TopľouPrešov Region17.6
- 18TrenčínTrenčín Region17.4
- 19KolárovoNitra Region16.1
- 20TrnavaTrnava Region15.9
+ 7 more cities, the next at 15.0 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.