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 Dec 2024: Revúca 37.9 µg/m³, Šahy 35.0 µg/m³ and Žarnovica 32.0 µg/m³.
- 1RevúcaBanská Bystrica Region37.9
- 2ŠahyNitra Region35.0
- 3ŽarnovicaBanská Bystrica Region32.0
- 4ČaňaKošice Region25.2
- 5HnúšťaBanská Bystrica Region21.6
- 6ZvolenBanská Bystrica Region21.2
- 7KošiceKošice Region20.6
- 8PrešovPrešov Region20.4
- 9HumennéPrešov Region20.4
- 10KrompachyKošice Region20.3
- 11PúchovTrenčín Region19.4
- 12TrebišovKošice Region19.1
- 13PezinokBratislava Region18.3
- 14Vranov nad TopľouPrešov Region17.9
- 15PrievidzaTrenčín Region17.3
- 16BardejovPrešov Region16.4
- 17Banská BystricaBanská Bystrica Region16.4
- 18NitraNitra Region16.3
- 19KolárovoNitra Region16.1
- 20OščadnicaŽilina Region15.9
+ 18 more cities, 15.9 µg/m³ and below
Not counted on this day, too few days measured: Komárno since 3 Dec 2024, Lučenec since 24 Nov 2024 and Ružomberok since 22 Nov 2024.
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.