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 16 Feb 2025: Revúca 39.5 µg/m³, Šahy 39.3 µg/m³ and Čaňa 33.2 µg/m³.
- 1RevúcaBanská Bystrica Region39.5
- 2ŠahyNitra Region39.3
- 3ČaňaKošice Region33.2
- 4ŽarnovicaBanská Bystrica Region30.7
- 5LučenecBanská Bystrica Region29.9
- 6RužomberokŽilina Region29.4
- 7KrompachyKošice Region28.3
- 8MartinŽilina Region27.1
- 9OščadnicaŽilina Region26.9
- 10ČadcaŽilina Region26.9
- 11ŽilinaŽilina Region26.6
- 12PrešovPrešov Region26.4
- 13HnúšťaBanská Bystrica Region26.4
- 14KošiceKošice Region25.8
- 15PúchovTrenčín Region25.5
- 16Liptovský Mikulᚎilina Region25.1
- 17TrebišovKošice Region23.5
- 18ZvolenBanská Bystrica Region23.3
- 19Vranov nad TopľouPrešov Region22.8
- 20HumennéPrešov Region22.8
+ 22 more cities, the next at 20.7 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.