SmogRank / Countries / Reunion / September 2026

Most polluted cities in Reunion, September 2026

1 city in Reunion ranked by their average PM2.5 over the 30 days. Worst: Saint-Denis at 3.2 µg/m³, #2,247 of 2,332 cities in the world. A city needs measurements on 70% of the days to be ranked.

  1. 1Saint-DenisReunion
    3.2
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 · Reunion now

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

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