Air Quality Lab — Trondheim, Norway
Air Quality Profile
Trondheim reports an annual PM2.5 of 4.4 µg/m³. That's below the WHO 2021 annual guideline of 5 µg/m³ — cleaner than most cities on the continent.
Trondheim
Norway
NorwayAnnual Average
ExcellentWHO annual classification
4.4µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
5.95.9 µg/m³ — Good
5.05.0 µg/m³ — Excellent
3.83.8 µg/m³ — Excellent
3.53.5 µg/m³ — Excellent
4.94.9 µg/m³ — Excellent
5.05.0 µg/m³ — Excellent
4.54.5 µg/m³ — Excellent
4.24.2 µg/m³ — Excellent
3.53.5 µg/m³ — Excellent
4.04.0 µg/m³ — Excellent
4.04.0 µg/m³ — Excellent
5.05.0 µg/m³ — Excellent
Jan
Feb
Mar
Apr
May
Jun
5.95.9 µg/m³ — Good
5.05.0 µg/m³ — Excellent
3.83.8 µg/m³ — Excellent
3.53.5 µg/m³ — Excellent
4.94.9 µg/m³ — Excellent
5.05.0 µg/m³ — Excellent
Jul
Aug
Sep
Oct
Nov
Dec
4.54.5 µg/m³ — Excellent
4.24.2 µg/m³ — Excellent
3.53.5 µg/m³ — Excellent
4.04.0 µg/m³ — Excellent
4.04.0 µg/m³ — Excellent
5.05.0 µg/m³ — Excellent
Best months: Mar–Apr, SepWorst months: Jan, Jun, Dec
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
Trondheim: 4.4 µg/m³. Typical range in Norway: 4.3–5.8 µg/m³. Low anchor: Alta, 0.0 µg/m³. High anchor: Oslo, 6.5 µg/m³.
34 cities tracked