SmogRank / Countries / Brazil / April 2026
Most polluted cities in Brazil, April 2026
6 cities in Brazil ranked by their average PM2.5 over the 30 days. Worst: Nilópolis at 15.2 µg/m³, #306 of 2,283 cities in the world. Cleanest: Barra da Tijuca at 7.1. A city needs measurements on 70% of the days to be ranked.
- 1NilópolisRio de Janeiro 15.2
- 2ItaguaíRio de Janeiro 10.9
- 3Duque de CaxiasRio de Janeiro 10.8
- 4AcariRio de Janeiro 7.6
- 5Rio de JaneiroRio de Janeiro 7.3
- 6Barra da TijucaRio de Janeiro 7.1
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+