Air Quality Lab — Castries, Saint Lucia
Air Quality Profile·
Castries reports an annual PM2.5 of 9.9 µg/m³. That's close to the WHO 2021 annual guideline (5 µg/m³) and well inside historically healthy ranges.
Castries
Saint Lucia
Saint LuciaAnnual Average
GoodWHO annual classification
9.9µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
8.08.0 µg/m³ — Good
8.78.7 µg/m³ — Good
7.77.7 µg/m³ — Good
8.88.8 µg/m³ — Good
1010 µg/m³ — Fair
1313 µg/m³ — Fair
1313 µg/m³ — Fair
1212 µg/m³ — Fair
8.58.5 µg/m³ — Good
1111 µg/m³ — Fair
9.99.9 µg/m³ — Good
8.18.1 µg/m³ — Good
Jan
Feb
Mar
Apr
May
Jun
8.08.0 µg/m³ — Good
8.78.7 µg/m³ — Good
7.77.7 µg/m³ — Good
8.88.8 µg/m³ — Good
1010 µg/m³ — Fair
1313 µg/m³ — Fair
Jul
Aug
Sep
Oct
Nov
Dec
1313 µg/m³ — Fair
1212 µg/m³ — Fair
8.58.5 µg/m³ — Good
1111 µg/m³ — Fair
9.99.9 µg/m³ — Good
8.18.1 µg/m³ — Good
Best months: Jan, Mar, DecWorst months: Jun–Aug
Good5–10 µg/m³Fair10–15 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared worldwide
Castries: 9.9 µg/m³. Typical range: 8.9–26.6 µg/m³. Low anchor: Bergen, 4.9 µg/m³. High anchor: Diepsloot, 162.1 µg/m³.
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