SmogRank / Countries / Iceland / September 2025

Most polluted cities in Iceland, September 2025

3 cities in Iceland ranked by their average PM2.5 over the 30 days. Worst: Hafnarfjörður at 3.7 µg/m³, #2,351 of 2,439 cities in the world. Cleanest: Kópavogur at 1.9. A city needs measurements on 70% of the days to be ranked.

  1. 1HafnarfjörðurCapital Region
    3.7
  2. 2ReykjavíkCapital Region
    2.1
  3. 3KópavogurCapital Region
    1.9
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 2025 · Iceland now