Air Quality Lab — Caldas da Rainha, Portugal
Air Quality Profile·
Caldas da Rainha reports an annual PM2.5 of 8.2 µg/m³. That's close to the WHO 2021 annual guideline (5 µg/m³) and well inside historically healthy ranges.
Caldas da Rainha
Portugal
PortugalAnnual Average
GoodWHO annual classification
8.2µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
9.79.7 µg/m³ — Good
9.69.6 µg/m³ — Good
8.98.9 µg/m³ — Good
7.27.2 µg/m³ — Good
8.08.0 µg/m³ — Good
7.37.3 µg/m³ — Good
7.27.2 µg/m³ — Good
7.57.5 µg/m³ — Good
7.67.6 µg/m³ — Good
8.18.1 µg/m³ — Good
8.28.2 µg/m³ — Good
8.88.8 µg/m³ — Good
Jan
Feb
Mar
Apr
May
Jun
9.79.7 µg/m³ — Good
9.69.6 µg/m³ — Good
8.98.9 µg/m³ — Good
7.27.2 µg/m³ — Good
8.08.0 µg/m³ — Good
7.37.3 µg/m³ — Good
Jul
Aug
Sep
Oct
Nov
Dec
7.27.2 µg/m³ — Good
7.57.5 µg/m³ — Good
7.67.6 µg/m³ — Good
8.18.1 µg/m³ — Good
8.28.2 µg/m³ — Good
8.88.8 µg/m³ — Good
Best months: Apr, Jun–JulWorst months: Jan–Mar
Good5–10 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across Portugal
Caldas da Rainha: 8.2 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