SmogRank / Countries / Finland / December 2025

Most polluted cities in Finland, December 2025

11 cities in Finland ranked by their average PM2.5 over the 31 days. Worst: Pori at 5.9 µg/m³, #1,945 of 2,360 cities in the world. Cleanest: Jyväskylä at 1.7. A city needs measurements on 70% of the days to be ranked.

  1. 1PoriSatakunta
    5.9
  2. 2HelsinkiUusimaa
    4.5
  3. 2MyyrmäkiUusimaa
    4.5
  4. 4LappeenrantaSouth Karelia
    4.4
  5. 5VantaaUusimaa
    3.9
  6. 6LohjaUusimaa
    3.8
  7. 7LahtiPaijat-Hame
    3.1
  8. 8KlaukkalaUusimaa
    2.8
  9. 9TamperePirkanmaa
    2.7
  10. 10KuopioNorth Savo
    2.4
  11. 11JyväskyläCentral Finland
    1.7
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

All cities in the world, December 2025 · Finland now