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.
- 1Saint-DenisReunion 3.70.7×
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+
PM2.5 in µg/m³, coloured by the US EPA's PM2.5 categories. 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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