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 29 Mar 2023: Spišská Nová Ves 20.5 µg/m³, Humenné 19.3 µg/m³ and Púchov 19.0 µg/m³.
- 1Spišská Nová VesKošice Region20.5
- 2HumennéPrešov Region19.3
- 3PúchovTrenčín Region19.0
- 4ŽilinaŽilina Region18.7
- 5LučenecBanská Bystrica Region18.7
- 6ČadcaŽilina Region18.4
- 7TrebišovKošice Region18.0
- 8PrešovPrešov Region18.0
- 9KošiceKošice Region17.9
- 10RužomberokŽilina Region16.8
- 11BardejovPrešov Region16.2
- 12TrenčínTrenčín Region16.2
- 13MartinŽilina Region16.2
- 14SenicaTrnava Region15.8
- 15TrnavaTrnava Region14.9
- 16Banská BystricaBanská Bystrica Region14.8
- 17Vranov nad TopľouPrešov Region14.6
- 18KomárnoNitra Region14.5
- 19PrievidzaTrenčín Region14.4
- 20HandlováTrenčín Region14.3
+ 10 more cities, the next at 13.7 µg/m³
Not counted on this day, too few days measured: Pezinok since 29 Mar 2023, Senec since 28 Mar 2023, Malacky since 24 Mar 2023 and 4 more cities. Days missing from the source archive fall in this window, so fewer countries are counted.
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.