Air Quality Lab — Cayenne, French Guiana
Air Quality Profile·
Cayenne reports an annual PM2.5 of 11.1 µg/m³. That's roughly double the WHO 2021 guideline but still far below the EU annual limit of 25 µg/m³.
Cayenne
French Guiana
French GuianaAnnual Average
FairWHO annual classification
11.1µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
1616 µg/m³ — Moderate
1414 µg/m³ — Fair
1414 µg/m³ — Fair
1212 µg/m³ — Fair
1111 µg/m³ — Fair
1010 µg/m³ — Fair
7.87.8 µg/m³ — Good
8.38.3 µg/m³ — Good
7.47.4 µg/m³ — Good
8.28.2 µg/m³ — Good
1111 µg/m³ — Fair
1414 µg/m³ — Fair
Jan
Feb
Mar
Apr
May
Jun
1616 µg/m³ — Moderate
1414 µg/m³ — Fair
1414 µg/m³ — Fair
1212 µg/m³ — Fair
1111 µg/m³ — Fair
1010 µg/m³ — Fair
Jul
Aug
Sep
Oct
Nov
Dec
7.87.8 µg/m³ — Good
8.38.3 µg/m³ — Good
7.47.4 µg/m³ — Good
8.28.2 µg/m³ — Good
1111 µg/m³ — Fair
1414 µg/m³ — Fair
Best months: Jul, Sep–OctWorst months: Jan, Mar, 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 French Guiana
Cayenne: 11.1 µg/m³. Typical range in French Guiana: 11.0–11.1 µg/m³. Low anchor: Matoury, 11.0 µg/m³. High anchor: Saint-Laurent-du-Maroni, 12.0 µg/m³.
4 cities tracked