SmogRank / Countries / Iceland / October 2025

Most polluted cities in Iceland, October 2025

3 cities in Iceland ranked by their average PM2.5 over the 31 days. Worst: Hafnarfjörður at 8.0 µg/m³, #624 of 2,110 cities in the world. Cleanest: Kópavogur at 1.8. A city needs measurements on 70% of the days to be ranked.

  1. 1HafnarfjörðurCapital Region
    8.0
  2. 2ReykjavíkCapital Region
    2.3
  3. 3KópavogurCapital Region
    1.8
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 · Iceland now

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SmogRank, most polluted cities in Iceland, PM2.5, October 2025, smogrank.com/is/history/2025-10 (accessed 2 Oct 2026).

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