Air Quality Lab — San Marino, San Marino
Air Quality Profile·
San Marino reports an annual PM2.5 of 10.4 µg/m³. That's roughly double the WHO 2021 guideline but still far below the EU annual limit of 25 µg/m³.
San Marino
San Marino
San MarinoAnnual Average
FairWHO annual classification
10.4µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
1515 µg/m³ — Moderate
1616 µg/m³ — Moderate
1111 µg/m³ — Fair
9.29.2 µg/m³ — Good
6.46.4 µg/m³ — Good
9.49.4 µg/m³ — Good
9.39.3 µg/m³ — Good
8.98.9 µg/m³ — Good
9.19.1 µg/m³ — Good
9.39.3 µg/m³ — Good
9.79.7 µg/m³ — Good
1212 µg/m³ — Fair
Jan
Feb
Mar
Apr
May
Jun
1515 µg/m³ — Moderate
1616 µg/m³ — Moderate
1111 µg/m³ — Fair
9.29.2 µg/m³ — Good
6.46.4 µg/m³ — Good
9.49.4 µg/m³ — Good
Jul
Aug
Sep
Oct
Nov
Dec
9.39.3 µg/m³ — Good
8.98.9 µg/m³ — Good
9.19.1 µg/m³ — Good
9.39.3 µg/m³ — Good
9.79.7 µg/m³ — Good
1212 µg/m³ — Fair
Best months: May, Aug–SepWorst months: Jan–Feb, Dec
Good5–10 µg/m³Fair10–15 µg/m³Moderate15–25 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across Europe
San Marino: 10.4 µg/m³. Typical range in Europe: 7.8–12.5 µg/m³. Low anchor: Bergen, 4.9 µg/m³. High anchor: Batman, 38.1 µg/m³.
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