SmogRank / Countries / French Guiana
Most polluted cities in French Guiana
2 measured cities ranked by PM2.5, last 7 days. Worst: Cayenne at 6.1 µg/m³, #1499 in the world.
Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data
Estimated: cities without a monitor
French Guiana cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.
| City | 7-day estimate |
|---|---|
| Matoury estimated | ≈ 5 µg/m³ |
| Saint-Laurent-du-Maroni estimated | ≈ 5 µg/m³ |
| Rémire-Montjoly estimated | ≈ 5 µg/m³ |
Updated 2026-10-01 13:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.