SmogRank / Countries / Finland / May 2025

Most polluted cities in Finland, May 2025

12 cities in Finland ranked by their average PM2.5 over the 31 days. Worst: Helsinki at 5.3 µg/m³, #1,724 of 2,193 cities in the world. Cleanest: Klaukkala at 3.4. A city needs measurements on 70% of the days to be ranked.

  1. 1HelsinkiUusimaa
    5.3
  2. 2LappeenrantaSouth Karelia
    5.1
  3. 3MyyrmäkiUusimaa
    4.8
  4. 4OuluNorth Ostrobothnia
    4.5
  5. 5JyväskyläCentral Finland
    4.3
  6. 6VantaaUusimaa
    4.1
  7. 6KuopioNorth Savo
    4.1
  8. 8PoriSatakunta
    3.9
  9. 8LohjaUusimaa
    3.9
  10. 8LahtiPaijat-Hame
    3.9
  11. 11TamperePirkanmaa
    3.8
  12. 12KlaukkalaUusimaa
    3.4
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, May 2025 · Finland now