SmogRank / Countries / Finland / September 2026

Most polluted cities in Finland, September 2026

12 cities in Finland ranked by their average PM2.5 over the 30 days. Worst: Helsinki at 4.1 µg/m³, #2,102 of 2,332 cities in the world. Cleanest: Kuopio at 2.5. A city needs measurements on 70% of the days to be ranked.

  1. 1HelsinkiUusimaa
    4.1
  2. 1MyyrmäkiUusimaa
    4.1
  3. 3LappeenrantaSouth Karelia
    3.9
  4. 4VantaaUusimaa
    3.7
  5. 4LohjaUusimaa
    3.7
  6. 6PoriSatakunta
    3.4
  7. 7OuluNorth Ostrobothnia
    3.3
  8. 8LahtiPaijat-Hame
    3.1
  9. 9KlaukkalaUusimaa
    3.0
  10. 10TamperePirkanmaa
    2.9
  11. 11JyväskyläCentral Finland
    2.7
  12. 12KuopioNorth Savo
    2.5
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, September 2026 · Finland now

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SmogRank, most polluted cities in Finland, PM2.5, September 2026, smogrank.com/fi/history/2026-09 (accessed 2 Oct 2026).

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