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 15 Mar 2025: Šahy 39.8 µg/m³, Čaňa 36.6 µg/m³ and Revúca 33.7 µg/m³.
- 1ŠahyNitra Region39.8
- 2ČaňaKošice Region36.6
- 3RevúcaBanská Bystrica Region33.7
- 4LučenecBanská Bystrica Region33.0
- 5ŽarnovicaBanská Bystrica Region32.2
- 6TrebišovKošice Region28.5
- 7ŽilinaŽilina Region28.5
- 8HumennéPrešov Region28.2
- 9MartinŽilina Region28.0
- 10PrešovPrešov Region27.9
- 11PúchovTrenčín Region26.7
- 12RužomberokŽilina Region26.5
- 13KrompachyKošice Region26.2
- 14KošiceKošice Region26.0
- 15TrenčínTrenčín Region25.2
- 16OščadnicaŽilina Region25.0
- 17ČadcaŽilina Region25.0
- 18PezinokBratislava Region24.8
- 19HnúšťaBanská Bystrica Region22.6
- 20BardejovPrešov Region22.3
+ 20 more cities, 22.0 µg/m³ and below
Not counted on this day, too few days measured: Malacky since 6 Mar 2025 and Vranov nad Topľou since 3 Mar 2025.
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.