Most polluted cities in Brazil
5 measured cities, this year; 5 above the WHO annual guideline. Worst: Nilópolis at 18.0 µg/m³, #253 in the world.
3 good 2 moderate
- 1NilópolisRio de Janeiro 18.03.6×
- 2Duque de CaxiasRio de Janeiro 11.62.3×
- 3Barra da TijucaRio de Janeiro 8.11.6×
- 4AcariRio de Janeiro 7.91.6×
- 5Rio de JaneiroRio de Janeiro 7.51.5×
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+
Estimated: cities without a monitor
Brazil cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.
| City | 7-day estimate |
|---|---|
| São Paulo | ≈ 28 µg/m³ |
| Belo Horizonte | ≈ 8 µg/m³ |
| Salvador | ≈ 12 µg/m³ |
| Fortaleza | ≈ 10 µg/m³ |
| Manaus | ≈ 46 µg/m³ |
| Brasília | ≈ 14 µg/m³ |
| Curitiba | ≈ 10 µg/m³ |
| Recife | ≈ 8 µg/m³ |
| Goiânia | ≈ 10 µg/m³ |
| Belém | ≈ 9 µg/m³ |
| Porto Alegre | ≈ 12 µg/m³ |
| Guarulhos | ≈ 29 µg/m³ |
| Maceió | ≈ 11 µg/m³ |
| Campinas | ≈ 23 µg/m³ |
| São Luís | ≈ 8 µg/m³ |
| Campo Grande | ≈ 9 µg/m³ |
| Natal | ≈ 9 µg/m³ |
| Teresina | ≈ 11 µg/m³ |
| Nova Iguaçu | ≈ 22 µg/m³ |
| São Bernardo do Campo | ≈ 29 µg/m³ |
| João Pessoa | ≈ 8 µg/m³ |
| Sorocaba | ≈ 14 µg/m³ |
| Uberlândia | ≈ 9 µg/m³ |
| Osasco | ≈ 28 µg/m³ |
| São José dos Campos | ≈ 11 µg/m³ |
| Ribeirão Preto | ≈ 33 µg/m³ |
| Aracaju | ≈ 8 µg/m³ |
| Joinville | ≈ 9 µg/m³ |
| Santo André | ≈ 29 µg/m³ |
| Jaboatão dos Guararapes | ≈ 16 µg/m³ |
| Contagem | ≈ 8 µg/m³ |
| Cuiabá | ≈ 10 µg/m³ |
| Feira de Santana | ≈ 11 µg/m³ |
| Londrina | ≈ 19 µg/m³ |
| Porto Velho | ≈ 26 µg/m³ |
| Juiz de Fora | ≈ 9 µg/m³ |
| Ananindeua | ≈ 8 µg/m³ |
| Aparecida de Goiânia | ≈ 10 µg/m³ |
| Serra | ≈ 8 µg/m³ |
| Belford Roxo | ≈ 22 µg/m³ |
Updated 2026-10-01 19:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.