SmogRank / Countries / Norway / 2025

Most polluted cities in Norway, 2025

14 cities in Norway ranked by their average PM2.5 over the 365 days; 11 above the WHO annual guideline (5.0 µg/m³). Worst: Porsgrunn at 9.0 µg/m³, #1,050 of 2,131 cities in the world. Cleanest: Bodø at 3.6. A city needs measurements on 70% of the days to be ranked.

  1. 1PorsgrunnTelemark
    9.01.8×
  2. 2SarpsborgØstfold
    8.41.7×
  3. 3FredrikstadØstfold
    7.71.5×
  4. 3DrammenBuskerud
    7.71.5×
  5. 5MossØstfold
    7.61.5×
  6. 6LillehammerInnlandet
    7.41.5×
  7. 7OsloOslo
    6.91.4×
  8. 8GjøvikInnlandet
    6.11.2×
  9. 9BergenVestland
    5.81.2×
  10. 10NesttunVestland
    5.71.1×
  11. 11Mo i RanaNordland
    5.31.1×
  12. 12TrondheimTrøndelag
    4.60.9×
  13. 13ÅsaneVestland
    4.40.9×
  14. 14BodøNordland
    3.60.7×
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, 2025 · Norway now