SmogRank / World / Norway / December 2025
Most polluted cities in Norway, December 2025
No city in Norway had measurements on 70% of the days, so December 2025 has no board for Norway.
Good0–5
Fair6–15
Moderate16–50
Poor51–90
Very poor91–140
Extremely poor141+
The European Environment Agency's air quality index bands for PM2.5 (2024 revision); it has bands, not numbers, so values stay in µg/m³. Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales