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 22 May 2024: Čaňa 14.7 µg/m³, Prešov 12.9 µg/m³ and Žarnovica 12.4 µg/m³.
- 1ČaňaKošice Region14.7
- 2PrešovPrešov Region12.9
- 3ŽarnovicaBanská Bystrica Region12.4
- 4RužomberokŽilina Region11.9
- 5KrompachyKošice Region11.8
- 6TrnavaTrnava Region11.4
- 7ŠahyNitra Region11.3
- 8PúchovTrenčín Region11.2
- 9MartinŽilina Region11.0
- 10KomárnoNitra Region10.9
- 11KošiceKošice Region10.2
- 12HumennéPrešov Region10.1
- 13TrebišovKošice Region9.9
- 14OščadnicaŽilina Region9.9
- 15ČadcaŽilina Region9.9
- 16Liptovský Mikulᚎilina Region9.8
- 17SereďTrnava Region9.7
- 18LučenecBanská Bystrica Region9.7
- 19BardejovPrešov Region9.5
- 20TrenčínTrenčín Region9.5
+ 19 more cities, the next at 9.5 µg/m³
Not counted on this day, too few days measured: Žilina since 12 May 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 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.