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 19 May 2024: Čaňa 14.7 µg/m³, Prešov 12.6 µg/m³ and Žarnovica 12.5 µg/m³.
- 1ČaňaKošice Region14.7
- 2PrešovPrešov Region12.6
- 3ŽarnovicaBanská Bystrica Region12.5
- 4RužomberokŽilina Region12.1
- 5TrnavaTrnava Region11.4
- 6ŠahyNitra Region11.4
- 7KrompachyKošice Region11.3
- 8PúchovTrenčín Region11.1
- 9MartinŽilina Region11.0
- 10KomárnoNitra Region10.6
- 11OščadnicaŽilina Region10.2
- 12ČadcaŽilina Region10.2
- 13KošiceKošice Region9.9
- 14HumennéPrešov Region9.7
- 15TrebišovKošice Region9.6
- 16SereďTrnava Region9.6
- 17Liptovský Mikulᚎilina Region9.6
- 18TrenčínTrenčín Region9.5
- 19SenecBratislava Region9.4
- 20PrievidzaTrenčín Region9.4
+ 19 more cities, 9.4 µg/m³ and below
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 readers for them. Most cities there are missing from this board, not clean. Why.