Air Quality Lab — Oslo, Norway
Air Quality Profile
Oslo reports an annual PM2.5 of 6.5 µg/m³. That's close to the WHO 2021 annual guideline (5 µg/m³) and well inside historically healthy ranges.
Oslo
Norway
NorwayAnnual Average
GoodWHO annual classification
6.5µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
8.38.3 µg/m³ — Good
9.09.0 µg/m³ — Good
7.47.4 µg/m³ — Good
4.74.7 µg/m³ — Excellent
5.55.5 µg/m³ — Good
6.36.3 µg/m³ — Good
5.15.1 µg/m³ — Good
7.27.2 µg/m³ — Good
5.25.2 µg/m³ — Good
6.16.1 µg/m³ — Good
5.75.7 µg/m³ — Good
7.27.2 µg/m³ — Good
Jan
Feb
Mar
Apr
May
Jun
8.38.3 µg/m³ — Good
9.09.0 µg/m³ — Good
7.47.4 µg/m³ — Good
4.74.7 µg/m³ — Excellent
5.55.5 µg/m³ — Good
6.36.3 µg/m³ — Good
Jul
Aug
Sep
Oct
Nov
Dec
5.15.1 µg/m³ — Good
7.27.2 µg/m³ — Good
5.25.2 µg/m³ — Good
6.16.1 µg/m³ — Good
5.75.7 µg/m³ — Good
7.27.2 µg/m³ — Good
Best months: Apr, Jul, SepWorst months: Jan–Mar
Excellent0–5 µg/m³Good5–10 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across Norway
Oslo: 6.5 µg/m³. Typical range in Norway: 4.3–5.8 µg/m³. Low anchor: Alta, 0.0 µg/m³. High anchor: Porsgrunn, 6.7 µg/m³.
34 cities tracked