SmogRank / World / Brazil / January 2025

Most polluted cities in Brazil, January 2025

2 cities in Brazil ranked by their average PM2.5 over the 31 days. Worst: Duque de Caxias at 9.3 µg/m³, #1,027 of 2,121 cities in the world. Cleanest: São Paulo at 6.9. A city needs measurements on 70% of the days to be ranked.

  1. 1Duque de CaxiasRio de Janeiro
    51
  2. 2São PauloSão Paulo
    38
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, January 2025 · Brazil now

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SmogRank, most polluted cities in Brazil, PM2.5, January 2025, smogrank.com/br/history/2025-01 (accessed 2 Oct 2026).

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