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 Nov 2024: Šahy 36.1 µg/m³, Čaňa 31.8 µg/m³ and Žarnovica 30.5 µg/m³.
- 1ŠahyNitra Region36.1
- 2ČaňaKošice Region31.8
- 3ŽarnovicaBanská Bystrica Region30.5
- 4RevúcaBanská Bystrica Region29.9
- 5PúchovTrenčín Region29.4
- 6LučenecBanská Bystrica Region28.6
- 7KrompachyKošice Region27.5
- 8PrešovPrešov Region25.9
- 9ŽilinaŽilina Region25.6
- 10MartinŽilina Region24.8
- 11OščadnicaŽilina Region24.6
- 12ČadcaŽilina Region24.6
- 13KošiceKošice Region24.1
- 14RužomberokŽilina Region24.0
- 15PezinokBratislava Region22.4
- 16HumennéPrešov Region21.8
- 17TrenčínTrenčín Region21.8
- 18KomárnoNitra Region21.7
- 19NitraNitra Region21.5
- 20TrebišovKošice Region21.4
+ 21 more cities, the next at 21.2 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.