SmogRank / Cleaner or dirtier / Norway
Norway: cleaner or dirtier, 2025
In Norway, 17 cities have enough days in both years to compare 2025 with the same days of 2024: 5 got dirtier and 11 cleaner.
The 5 cities that got dirtier, biggest rise first
| # | City | 2024 | 2025 | Change |
|---|---|---|---|---|
| 1 | KristiansandAgder, Norway | 38 | 43 | +1.0 µg/m³+15% |
| 2 | LillehammerInnlandet, Norway | 36 | 40 | +0.7 µg/m³+11% |
| 3 | NesttunVestland, Norway | 29 | 31 | +0.4 µg/m³+8% |
| 4 | ÅsaneVestland, Norway | 23 | 24 | +0.2 µg/m³+5% |
| 5 | BergenVestland, Norway | 31 | 32 | +0.1 µg/m³+2% |
The 11 cities that got cleaner, biggest fall first
| # | City | 2024 | 2025 | Change |
|---|---|---|---|---|
| 1 | BrumunddalInnlandet, Norway | 53 | 44 | −2.2 µg/m³−22% |
| 2 | FredrikstadØstfold, Norway | 51 | 43 | −1.6 µg/m³−17% |
| 3 | Mo i RanaNordland, Norway | 38 | 29 | −1.5 µg/m³−22% |
| 4 | MossØstfold, Norway | 50 | 44 | −1.1 µg/m³−12% |
| 5 | OsloNorway | 42 | 38 | −0.8 µg/m³−11% |
| 6 | DrammenBuskerud, Norway | 46 | 42 | −0.7 µg/m³−9% |
| 7 | SarpsborgØstfold, Norway | 50 | 46 | −0.7 µg/m³−8% |
| 8 | ElverumInnlandet, Norway | 41 | 38 | −0.6 µg/m³−8% |
| 9 | TrondheimTrøndelag, Norway | 28 | 25 | −0.5 µg/m³−10% |
| 10 | BodøNordland, Norway | 21 | 20 | −0.1 µg/m³−3% |
| 11 | PorsgrunnTelemark, Norway | 51 | 50 | −0.1 µg/m³−1% |
Means in US AQI over the days a city was measured in both years, the same calendar days each year; a city needs 55% of the days paired, and at least 30. The change is in µg/m³ and per cent. How we compare.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
Updated 2026-10-07 12:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.