SmogRank / World / French Guiana / September 2026

Most polluted cities in French Guiana, September 2026

2 cities in French Guiana ranked by their average PM2.5 over the 30 days. Worst: Cayenne at 8.4 µg/m³, #565 of 2,330 cities in the world. Cleanest: Kourou at 6.9. A city needs measurements on 70% of the days to be ranked.

  1. 1CayenneGuyane
    8.4
  2. 2KourouGuyane
    6.9
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, September 2026 · French Guiana now

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SmogRank, most polluted cities in French Guiana, PM2.5, September 2026, smogrank.com/gf/history/2026-09 (accessed 2 Oct 2026).

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