SmogRank / Countries / Brazil / Rio de Janeiro
Most polluted cities in Rio de Janeiro, Brazil
6 measured cities ranked by PM2.5, last 7 days. Worst: Nilópolis at 17.5 µg/m³, #197 in the world.
| # | City | µg/m³ | |
|---|---|---|---|
| 1 | Nilópolis Rio de Janeiro | 17.5 | |
| 2 | Itaguaí Rio de Janeiro | 10.7 | |
| 3 | Duque de Caxias Rio de Janeiro | 9.6 | |
| 4 | Acari Rio de Janeiro | 8.5 | |
| 5 | Barra da Tijuca Rio de Janeiro | 8.5 | |
| 6 | Rio de Janeiro Rio de Janeiro | 7.5 |
Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data
Estimated: cities without a monitor
Rio de Janeiro 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 |
|---|---|
| Nova Iguaçu estimated | ≈ 22 µg/m³ |
| Belford Roxo estimated | ≈ 22 µg/m³ |
| Niterói estimated | ≈ 22 µg/m³ |
| Campos dos Goytacazes estimated | ≈ 15 µg/m³ |
| São João de Meriti estimated | ≈ 22 µg/m³ |
| Petrópolis estimated | ≈ 15 µg/m³ |
| São Gonçalo estimated | ≈ 22 µg/m³ |
| Volta Redonda estimated | ≈ 18 µg/m³ |
| Macaé estimated | ≈ 12 µg/m³ |
| Magé estimated | ≈ 22 µg/m³ |
| Itaboraí estimated | ≈ 11 µg/m³ |
| Cabo Frio estimated | ≈ 12 µg/m³ |
| Maricá estimated | ≈ 11 µg/m³ |
| Nova Friburgo estimated | ≈ 7 µg/m³ |
| Barra Mansa estimated | ≈ 18 µg/m³ |
| Angra dos Reis estimated | ≈ 13 µg/m³ |
| Teresópolis estimated | ≈ 8 µg/m³ |
| Rio das Ostras estimated | ≈ 11 µg/m³ |
| Queimados estimated | ≈ 22 µg/m³ |
| Araruama estimated | ≈ 9 µg/m³ |
| Resende estimated | ≈ 14 µg/m³ |
| São Pedro da Aldeia estimated | ≈ 12 µg/m³ |
| Itaperuna estimated | ≈ 9 µg/m³ |
| Japeri estimated | ≈ 22 µg/m³ |
| Barra do Piraí estimated | ≈ 18 µg/m³ |
| Saquarema estimated | ≈ 9 µg/m³ |
| Seropédica estimated | ≈ 22 µg/m³ |
| Botafogo estimated | ≈ 22 µg/m³ |
| Três Rios estimated | ≈ 9 µg/m³ |
| Valença estimated | ≈ 18 µg/m³ |
| Cachoeiras de Macacu estimated | ≈ 8 µg/m³ |
| Rio Bonito estimated | ≈ 11 µg/m³ |
| Guapimirim estimated | ≈ 8 µg/m³ |
| São Francisco de Itabapoana estimated | ≈ 10 µg/m³ |
| Casimiro de Abreu estimated | ≈ 7 µg/m³ |
| Mangaratiba estimated | ≈ 18 µg/m³ |
| Cordovil estimated | ≈ 22 µg/m³ |
| Paraíba do Sul estimated | ≈ 9 µg/m³ |
| Santo Antônio de Pádua estimated | ≈ 10 µg/m³ |
| Paracambi estimated | ≈ 22 µg/m³ |
Updated 2026-10-01 13:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.