SmogRank / Countries / Finland / August 2025

Most polluted cities in Finland, August 2025

12 cities in Finland ranked by their average PM2.5 over the 31 days. Worst: Helsinki at 4.6 µg/m³, #2,174 of 2,284 cities in the world. Cleanest: Kuopio at 3.1. A city needs measurements on 70% of the days to be ranked.

  1. 1HelsinkiUusimaa
    4.6
  2. 2MyyrmäkiUusimaa
    4.3
  3. 3LohjaUusimaa
    4.0
  4. 3LappeenrantaSouth Karelia
    4.0
  5. 3JyväskyläCentral Finland
    4.0
  6. 6VantaaUusimaa
    3.8
  7. 7OuluNorth Ostrobothnia
    3.5
  8. 8PoriSatakunta
    3.4
  9. 8LahtiPaijat-Hame
    3.4
  10. 10TamperePirkanmaa
    3.2
  11. 10KlaukkalaUusimaa
    3.2
  12. 12KuopioNorth Savo
    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, August 2025 · Finland now

Use this board

SmogRank, most polluted cities in Finland, PM2.5, August 2025, smogrank.com/fi/history/2025-08 (accessed 2 Oct 2026).

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.