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 18 Feb 2024: Revúca 37.6 µg/m³, Vranov nad Topľou 24.8 µg/m³ and Košice 24.8 µg/m³.
- 1RevúcaBanská Bystrica Region37.6
- 2Vranov nad TopľouPrešov Region24.8
- 3KošiceKošice Region24.8
- 4HumennéPrešov Region24.0
- 5TrebišovKošice Region23.9
- 6ČaňaKošice Region23.8
- 7LučenecBanská Bystrica Region23.7
- 8HnúšťaBanská Bystrica Region22.6
- 9PrešovPrešov Region22.4
- 10ČadcaŽilina Region21.7
- 11PúchovTrenčín Region21.4
- 12ŽilinaŽilina Region20.6
- 13BardejovPrešov Region20.2
- 14PrievidzaTrenčín Region18.9
- 15MartinŽilina Region17.7
- 16RužomberokŽilina Region17.6
- 17TrenčínTrenčín Region16.8
- 18PartizánskeTrenčín Region16.8
- 19ZvolenBanská Bystrica Region16.3
- 20NitraNitra Region15.1
+ 16 more cities, 15.0 µg/m³ and below
Not counted on this day, too few days measured: Karlova Ves since 8 Feb 2024, Spišská Nová Ves since 7 Feb 2024 and Smižany since 6 Feb 2024. Days missing from the source archive fall in this window, so fewer countries are counted.
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.