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 14 Mar 2025: Šahy 41.1 µg/m³, Čaňa 37.8 µg/m³ and Revúca 35.8 µg/m³.
- 1ŠahyNitra Region41.1
- 2ČaňaKošice Region37.8
- 3RevúcaBanská Bystrica Region35.8
- 4LučenecBanská Bystrica Region34.3
- 5ŽarnovicaBanská Bystrica Region33.2
- 6HumennéPrešov Region29.7
- 7ŽilinaŽilina Region29.6
- 8TrebišovKošice Region29.5
- 9PrešovPrešov Region29.1
- 10MartinŽilina Region28.9
- 11PúchovTrenčín Region27.9
- 12KošiceKošice Region27.5
- 13KrompachyKošice Region27.3
- 14RužomberokŽilina Region27.2
- 15PezinokBratislava Region26.2
- 16OščadnicaŽilina Region25.7
- 17ČadcaŽilina Region25.7
- 18HnúšťaBanská Bystrica Region23.7
- 19BardejovPrešov Region23.3
- 20ZvolenBanská Bystrica Region22.9
+ 19 more cities, 22.5 µg/m³ and below
Not counted on this day, too few days measured: Malacky since 6 Mar 2025, Vranov nad Topľou since 3 Mar 2025 and Trenčín since 2 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.