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 18 Jul 2024: Čaňa 19.5 µg/m³, Komárno 18.8 µg/m³ and Humenné 16.8 µg/m³.
- 1ČaňaKošice Region19.5
- 2KomárnoNitra Region18.8
- 3HumennéPrešov Region16.8
- 4KrompachyKošice Region16.5
- 5NitraNitra Region16.4
- 6PrešovPrešov Region16.2
- 7SereďTrnava Region15.2
- 8KošiceKošice Region15.0
- 9TrebišovKošice Region14.8
- 10ŽarnovicaBanská Bystrica Region14.3
- 11SenecBratislava Region14.0
- 12PezinokBratislava Region14.0
- 13Liptovský Mikulᚎilina Region13.6
- 14TrenčínTrenčín Region13.5
- 15Vranov nad TopľouPrešov Region13.4
- 16LučenecBanská Bystrica Region13.4
- 17RužomberokŽilina Region13.3
- 18SninaPrešov Region13.1
- 19TrnavaTrnava Region13.1
- 20KolárovoNitra Region13.0
+ 20 more cities, 12.8 µg/m³ and below
Not counted on this day, too few days measured: Púchov since 18 Jul 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.