SmogRank / Countries / Brazil / Rio de Janeiro
Most polluted cities in Rio de Janeiro, Brazil
6 measured cities, last 7 days; 1 above the WHO 24-hour guideline. Worst: Nilópolis at 17.5 µg/m³, #169 in the world.
3 good 3 moderate
- 1Nilópolis 17.5
- 2Itaguaí 10.7
- 3Duque de Caxias 9.6
- 4Acari 8.5
- 5Barra da Tijuca 8.5
- 6Rio de Janeiro 7.5
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 | ≈ 9 µg/m³ |
| Belford Roxo | ≈ 9 µg/m³ |
| Niterói | ≈ 9 µg/m³ |
| Campos dos Goytacazes | ≈ 7 µg/m³ |
| São João de Meriti | ≈ 9 µg/m³ |
| Petrópolis | ≈ 6 µg/m³ |
| São Gonçalo | ≈ 9 µg/m³ |
| Volta Redonda | ≈ 8 µg/m³ |
| Macaé | ≈ 5 µg/m³ |
| Magé | ≈ 9 µg/m³ |
| Itaboraí | ≈ 5 µg/m³ |
| Cabo Frio | ≈ 5 µg/m³ |
| Maricá | ≈ 5 µg/m³ |
| Nova Friburgo | ≈ 3 µg/m³ |
| Barra Mansa | ≈ 8 µg/m³ |
| Angra dos Reis | ≈ 6 µg/m³ |
| Teresópolis | ≈ 3 µg/m³ |
| Rio das Ostras | ≈ 5 µg/m³ |
| Queimados | ≈ 9 µg/m³ |
| Araruama | ≈ 4 µg/m³ |
| Resende | ≈ 6 µg/m³ |
| São Pedro da Aldeia | ≈ 5 µg/m³ |
| Itaperuna | ≈ 4 µg/m³ |
| Japeri | ≈ 9 µg/m³ |
| Barra do Piraí | ≈ 8 µg/m³ |
| Saquarema | ≈ 4 µg/m³ |
| Seropédica | ≈ 9 µg/m³ |
| Botafogo | ≈ 9 µg/m³ |
| Três Rios | ≈ 4 µg/m³ |
| Valença | ≈ 8 µg/m³ |
| Cachoeiras de Macacu | ≈ 3 µg/m³ |
| Rio Bonito | ≈ 5 µg/m³ |
| Guapimirim | ≈ 3 µg/m³ |
| São Francisco de Itabapoana | ≈ 4 µg/m³ |
| Casimiro de Abreu | ≈ 3 µg/m³ |
| Mangaratiba | ≈ 8 µg/m³ |
| Cordovil | ≈ 9 µg/m³ |
| Paraíba do Sul | ≈ 4 µg/m³ |
| Santo Antônio de Pádua | ≈ 4 µg/m³ |
| Paracambi | ≈ 9 µg/m³ |
Updated 2026-10-01 20:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.