SmogRank / Countries / Finland / October 2025

Most polluted cities in Finland, October 2025

10 cities in Finland ranked by their average PM2.5 over the 31 days. Worst: Lappeenranta at 4.9 µg/m³, #1,682 of 2,110 cities in the world. Cleanest: Tampere at 3.1. A city needs measurements on 70% of the days to be ranked.

  1. 1LappeenrantaSouth Karelia
    4.9
  2. 2HelsinkiUusimaa
    4.7
  3. 3MyyrmäkiUusimaa
    4.5
  4. 4VantaaUusimaa
    4.3
  5. 5LohjaUusimaa
    3.8
  6. 6PoriSatakunta
    3.6
  7. 6LahtiPaijat-Hame
    3.6
  8. 8KlaukkalaUusimaa
    3.4
  9. 9OuluNorth Ostrobothnia
    3.2
  10. 10TamperePirkanmaa
    3.1
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, October 2025 · Finland now