Air Quality Lab — Helsinki, Finland
Air Quality Profile
Helsinki reports an annual PM2.5 of 6.6 µg/m³. That's close to the WHO 2021 annual guideline (5 µg/m³) and well inside historically healthy ranges.
Helsinki
Finland
FinlandAnnual Average
GoodWHO annual classification
6.6µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
6.36.3 µg/m³ — Good
7.17.1 µg/m³ — Good
6.36.3 µg/m³ — Good
6.56.5 µg/m³ — Good
8.28.2 µg/m³ — Good
8.08.0 µg/m³ — Good
6.66.6 µg/m³ — Good
6.86.8 µg/m³ — Good
6.06.0 µg/m³ — Good
5.55.5 µg/m³ — Good
4.74.7 µg/m³ — Excellent
6.96.9 µg/m³ — Good
Jan
Feb
Mar
Apr
May
Jun
6.36.3 µg/m³ — Good
7.17.1 µg/m³ — Good
6.36.3 µg/m³ — Good
6.56.5 µg/m³ — Good
8.28.2 µg/m³ — Good
8.08.0 µg/m³ — Good
Jul
Aug
Sep
Oct
Nov
Dec
6.66.6 µg/m³ — Good
6.86.8 µg/m³ — Good
6.06.0 µg/m³ — Good
5.55.5 µg/m³ — Good
4.74.7 µg/m³ — Excellent
6.96.9 µg/m³ — Good
Best months: Sep–NovWorst months: Feb, May–Jun
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 Finland
Helsinki: 6.6 µg/m³. Typical range in Finland: 4.4–5.4 µg/m³. Low anchor: Kuusamo, 3.1 µg/m³. High anchor: Järvenpää, 7.0 µg/m³.
70 cities tracked