SmogRank / Countries / Brazil / August 2026

Most polluted cities in Brazil, August 2026

6 cities in Brazil ranked by their average PM2.5 over the 31 days. Worst: Nilópolis at 24.4 µg/m³, #103 of 2,312 cities in the world. Cleanest: Rio de Janeiro at 8.7. A city needs measurements on 70% of the days to be ranked.

  1. 1NilópolisRio de Janeiro
    24.4
  2. 2Duque de CaxiasRio de Janeiro
    14.9
  3. 3ItaguaíRio de Janeiro
    11.9
  4. 4Barra da TijucaRio de Janeiro
    11.1
  5. 5AcariRio de Janeiro
    9.8
  6. 6Rio de JaneiroRio de Janeiro
    8.7
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 2026 · Brazil now