SmogRank / Countries / Brazil / July 2026

Most polluted cities in Brazil, July 2026

6 cities in Brazil ranked by their average PM2.5 over the 31 days. Worst: Nilópolis at 23.8 µg/m³, #175 of 2,262 cities in the world. Cleanest: Acari at 8.7. A city needs measurements on 70% of the days to be ranked.

  1. 1NilópolisRio de Janeiro
    23.8
  2. 2Duque de CaxiasRio de Janeiro
    15.7
  3. 3ItaguaíRio de Janeiro
    13.1
  4. 4Barra da TijucaRio de Janeiro
    10.3
  5. 5Rio de JaneiroRio de Janeiro
    8.9
  6. 6AcariRio 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, July 2026 · Brazil now