SmogRank / World / Reunion / 2026

Most polluted cities in Reunion, 2026

1 city in Reunion ranked by their average PM2.5 so far (273 of 365 days); 0 above the WHO annual guideline (5.0 µg/m³). Worst: Saint-Denis at 3.7 µg/m³, #2,430 of 2,452 cities in the world. A city needs measurements on 70% of the days to be ranked.

  1. 1Saint-DenisReunion
    210.7×
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

All cities in the world, 2026 · Reunion now

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

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