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 19 Feb 2024: Revúca 36.9 µg/m³, Šahy 32.2 µg/m³ and Žarnovica 26.0 µg/m³.
- 1RevúcaBanská Bystrica Region36.9
- 2ŠahyNitra Region32.2
- 3ŽarnovicaBanská Bystrica Region26.0
- 4KrompachyKošice Region25.8
- 5Vranov nad TopľouPrešov Region25.1
- 6KošiceKošice Region24.9
- 7LučenecBanská Bystrica Region24.2
- 8HumennéPrešov Region24.1
- 9TrebišovKošice Region23.9
- 10ČaňaKošice Region23.8
- 11PrešovPrešov Region22.7
- 12HnúšťaBanská Bystrica Region22.5
- 13ČadcaŽilina Region21.6
- 14PúchovTrenčín Region21.3
- 15ŽilinaŽilina Region20.5
- 16OščadnicaŽilina Region20.4
- 17BardejovPrešov Region20.2
- 18PrievidzaTrenčín Region18.5
- 19MartinŽilina Region17.5
- 20RužomberokŽilina Region17.3
+ 21 more cities, 16.9 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.