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 17 Jan 2025: Revúca 44.7 µg/m³, Šahy 44.2 µg/m³ and Žarnovica 37.8 µg/m³.
- 1RevúcaBanská Bystrica Region44.7
- 2ŠahyNitra Region44.2
- 3ŽarnovicaBanská Bystrica Region37.8
- 4RužomberokŽilina Region31.2
- 5LučenecBanská Bystrica Region31.0
- 6HnúšťaBanská Bystrica Region27.3
- 7KrompachyKošice Region25.9
- 8ŽilinaŽilina Region25.5
- 9PúchovTrenčín Region25.5
- 10Liptovský Mikulᚎilina Region24.7
- 11ČaňaKošice Region24.4
- 12MartinŽilina Region23.3
- 13PezinokBratislava Region23.2
- 14ZvolenBanská Bystrica Region22.9
- 15OščadnicaŽilina Region21.7
- 16ČadcaŽilina Region21.7
- 17SereďTrnava Region21.3
- 18NitraNitra Region20.4
- 19PrievidzaTrenčín Region19.7
- 20HandlováTrenčín Region19.6
+ 22 more cities, the next at 19.1 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.