SmogRank / Countries / Norway / May 2025

Most polluted cities in Norway, May 2025

17 cities in Norway ranked by their average PM2.5 over the 31 days. Worst: Hamar at 6.8 µg/m³, #1,264 of 2,193 cities in the world. Cleanest: Gjøvik at 3.2. A city needs measurements on 70% of the days to be ranked.

  1. 1HamarInnlandet
    6.8
  2. 2PorsgrunnTelemark
    5.9
  3. 3KristiansandAgder
    5.8
  4. 4LillestrømAkershus
    5.0
  5. 5SarpsborgØstfold
    4.9
  6. 6NesttunVestland
    4.8
  7. 6MossØstfold
    4.8
  8. 8BergenVestland
    4.5
  9. 9OsloOslo
    4.4
  10. 10FredrikstadØstfold
    4.3
  11. 11ÅsaneVestland
    4.2
  12. 12TrondheimTrøndelag
    4.0
  13. 13DrammenBuskerud
    3.8
  14. 13BodøNordland
    3.8
  15. 15Mo i RanaNordland
    3.5
  16. 16LillehammerInnlandet
    3.2
  17. 16GjøvikInnlandet
    3.2
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, May 2025 · Norway now

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SmogRank, most polluted cities in Norway, PM2.5, May 2025, smogrank.com/no/history/2025-05 (accessed 2 Oct 2026).

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