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 21 Jul 2024: Čaňa 19.9 µg/m³, Púchov 19.3 µg/m³ and Komárno 18.6 µg/m³.
- 1ČaňaKošice Region19.9
- 2PúchovTrenčín Region19.3
- 3KomárnoNitra Region18.6
- 4HumennéPrešov Region16.7
- 5NitraNitra Region16.5
- 6PrešovPrešov Region16.1
- 7KrompachyKošice Region15.8
- 8SereďTrnava Region15.4
- 9TrebišovKošice Region14.8
- 10KošiceKošice Region14.8
- 11ŽarnovicaBanská Bystrica Region14.2
- 12PezinokBratislava Region14.1
- 13SenecBratislava Region13.9
- 14Liptovský Mikulᚎilina Region13.4
- 15KolárovoNitra Region13.4
- 16TrenčínTrenčín Region13.3
- 17Vranov nad TopľouPrešov Region13.1
- 18RužomberokŽilina Region13.1
- 19LučenecBanská Bystrica Region13.1
- 20SninaPrešov Region13.0
+ 21 more cities, the next at 13.0 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.