SmogRank / Cleaner or dirtier / Norway

Norway: cleaner or dirtier, 2026

In Norway, 16 cities have enough days in both years to compare 2026 so far (1 January to 6 October) with the same days of 2025: 7 got dirtier and 8 cleaner.

The 7 cities that got dirtier, biggest rise first

#	City	2025	2026	Change
1	TrondheimTrøndelag, Norway	26	37	+2.1 µg/m³+46%
2	BergenVestland, Norway	35	41	+1.1 µg/m³+17%
3	Mo i RanaNordland, Norway	31	37	+1.1 µg/m³+20%
4	LillehammerInnlandet, Norway	46	51	+0.8 µg/m³+10%
5	NesttunVestland, Norway	34	37	+0.6 µg/m³+10%
6	PorsgrunnTelemark, Norway	51	52	+0.3 µg/m³+3%
7	ÅsaneVestland, Norway	26	26	+0.1 µg/m³+2%

The 8 cities that got cleaner, biggest fall first

#	City	2025	2026	Change
1	BrumunddalInnlandet, Norway	53	43	−2.2 µg/m³−22%
2	DrammenBuskerud, Norway	50	42	−1.5 µg/m³−17%
3	GjøvikInnlandet, Norway	37	32	−1.0 µg/m³−15%
4	OsloNorway	40	35	−0.9 µg/m³−13%
5	ElverumInnlandet, Norway	46	41	−0.9 µg/m³−11%
6	SarpsborgØstfold, Norway	47	43	−0.8 µg/m³−9%
7	FredrikstadØstfold, Norway	45	44	−0.2 µg/m³−2%
8	BodøNordland, Norway	21	21	−0.1 µg/m³−3%

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.

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.