SmogRank / Countries / French Guiana / August 2026

Most polluted cities in French Guiana, August 2026

2 cities in French Guiana ranked by their average PM2.5 over the 31 days. Worst: Cayenne at 9.9 µg/m³, #634 of 2,312 cities in the world. Cleanest: Kourou at 8.4. A city needs measurements on 70% of the days to be ranked.

  1. 1CayenneGuyane
    9.9
  2. 2KourouGuyane
    8.4
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, August 2026 · French Guiana now