SmogRank / Countries / Norway / May 2026

Most polluted cities in Norway, May 2026

14 cities in Norway ranked by their average PM2.5 over the 31 days. Worst: Porsgrunn at 6.9 µg/m³, #1,262 of 2,243 cities in the world. Cleanest: Lillehammer at 3.2. A city needs measurements on 70% of the days to be ranked.

  1. 1PorsgrunnTelemark
    6.9
  2. 2MossØstfold
    6.8
  3. 3SarpsborgØstfold
    6.0
  4. 4FredrikstadØstfold
    5.5
  5. 5OsloOslo
    4.9
  6. 6TrondheimTrøndelag
    4.6
  7. 7NesttunVestland
    4.1
  8. 8BergenVestland
    3.9
  9. 9DrammenBuskerud
    3.8
  10. 10GjøvikInnlandet
    3.6
  11. 11ÅsaneVestland
    3.5
  12. 12Mo i RanaNordland
    3.4
  13. 12BodøNordland
    3.4
  14. 14LillehammerInnlandet
    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 2026 · Norway now