Air Quality Lab — Coimbra, Portugal
Air Quality Profile
Coimbra reports an annual PM2.5 of 9.2 µg/m³. That's close to the WHO 2021 annual guideline (5 µg/m³) and well inside historically healthy ranges.
Coimbra
Portugal
PortugalAnnual Average
GoodWHO annual classification
9.2µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
1313 µg/m³ — Fair
9.89.8 µg/m³ — Good
9.19.1 µg/m³ — Good
8.88.8 µg/m³ — Good
8.18.1 µg/m³ — Good
8.38.3 µg/m³ — Good
8.38.3 µg/m³ — Good
9.49.4 µg/m³ — Good
7.87.8 µg/m³ — Good
8.58.5 µg/m³ — Good
9.79.7 µg/m³ — Good
1010 µg/m³ — Fair
Jan
Feb
Mar
Apr
May
Jun
1313 µg/m³ — Fair
9.89.8 µg/m³ — Good
9.19.1 µg/m³ — Good
8.88.8 µg/m³ — Good
8.18.1 µg/m³ — Good
8.38.3 µg/m³ — Good
Jul
Aug
Sep
Oct
Nov
Dec
8.38.3 µg/m³ — Good
9.49.4 µg/m³ — Good
7.87.8 µg/m³ — Good
8.58.5 µg/m³ — Good
9.79.7 µg/m³ — Good
1010 µg/m³ — Fair
Best months: May–Jun, SepWorst months: Jan–Feb, Dec
Good5–10 µg/m³Fair10–15 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across Portugal
Coimbra: 9.2 µg/m³. Typical range in Portugal: 7.4–9.1 µg/m³. Low anchor: Ponta Delgada, 5.2 µg/m³. High anchor: Porto, 10.6 µg/m³.
85 cities tracked