SmogRank / Countries / French Guiana / 2026

Most polluted cities in French Guiana, 2026

2 cities in French Guiana ranked by their average PM2.5 so far (273 of 365 days); 2 above the WHO annual guideline (5.0 µg/m³). Worst: Cayenne at 10.4 µg/m³, #578 of 2,181 cities in the world. Cleanest: Kourou at 9.1. A city needs measurements on 70% of the days to be ranked.

  1. 1CayenneGuyane
    10.42.1×
  2. 2KourouGuyane
    9.11.8×
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

All cities in the world, 2026 · French Guiana now