SmogRank / History / City race
Cities in Finland, 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 Finland for PM2.5 over the 30 days to 17 Apr 2025: Laaksolahti 11.7 µg/m³, Myyrmäki 11.7 µg/m³ and Kuopio 9.2 µg/m³.
- 1LaaksolahtiUusimaa11.7
- 2MyyrmäkiUusimaa11.7
- 3KuopioNorth Savo9.2
- 4JyväskyläCentral Finland9.2
- 5VantaaUusimaa9.1
- 6LahtiPaijat-Hame8.9
- 7LappeenrantaSouth Karelia8.3
- 8HelsinkiUusimaa7.9
- 9LohjaUusimaa7.4
- 10KallahtiUusimaa7.4
- 11PoriSatakunta7.2
- 12TamperePirkanmaa5.3
- 13KlaukkalaUusimaa5.3
- 14HämeenkyläUusimaa5.3
- 15OuluNorth Ostrobothnia4.8
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.