SmogRank / World / Brazil / September 2023

Most polluted cities in Brazil, September 2023

2 cities in Brazil ranked by their average PM2.5 over the 30 days. Worst: São Paulo at 15.1 µg/m³, #148 of 1,863 cities in the world. Cleanest: Duque de Caxias at 9.1. A city needs measurements on 70% of the days to be ranked.

  1. 1São PauloSão Paulo
    62
  2. 2Duque de CaxiasRio de Janeiro
    51
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, September 2023 · Brazil now

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SmogRank, most polluted cities in Brazil, PM2.5, September 2023, smogrank.com/br/history/2023-09 (accessed 2 Oct 2026).

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