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 20 Jan 2024: Revúca 39.4 µg/m³, Spišská Nová Ves 31.9 µg/m³ and Smižany 31.9 µg/m³.
- 1RevúcaBanská Bystrica Region39.4
- 2Spišská Nová VesKošice Region31.9
- 3SmižanyKošice Region31.9
- 4ČaňaKošice Region26.8
- 5HumennéPrešov Region22.5
- 6HnúšťaBanská Bystrica Region20.9
- 7RužomberokŽilina Region20.4
- 8KošiceKošice Region19.6
- 9Vranov nad TopľouPrešov Region19.5
- 10PrešovPrešov Region19.3
- 11ŽilinaŽilina Region19.3
- 12PrievidzaTrenčín Region16.8
- 13TrenčínTrenčín Region16.0
- 14MartinŽilina Region15.9
- 15KolárovoNitra Region15.8
- 16TrnavaTrnava Region15.7
- 17ZvolenBanská Bystrica Region15.5
- 18SenicaTrnava Region15.2
- 19NitraNitra Region14.6
- 20Banská BystricaBanská Bystrica Region14.5
+ 7 more cities, 13.8 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.