SmogRank / Countries / Brazil / August 2025
Most polluted cities in Brazil, August 2025
3 cities in Brazil ranked by their average PM2.5 over the 31 days. Worst: Duque de Caxias at 11.2 µg/m³, #731 of 2,284 cities in the world. Cleanest: Acari at 10.8. A city needs measurements on 70% of the days to be ranked.
- 1Duque de CaxiasRio de Janeiro 11.2
- 2Rio de JaneiroRio de Janeiro 10.8
- 2AcariRio de Janeiro 10.8
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 2025 · Brazil now
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SmogRank, most polluted cities in Brazil, PM2.5, August 2025, smogrank.com/br/history/2025-08 (accessed 2 Oct 2026).
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