SmogRank / Countries / Brazil

Most polluted cities in 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.

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	Band
São Paulo	≈ 28 µg/m³	Moderate
Belo Horizonte	≈ 8 µg/m³	Good
Salvador	≈ 12 µg/m³	Moderate
Fortaleza	≈ 10 µg/m³	Moderate
Manaus	≈ 46 µg/m³	Unhealthy for sensitive groups
Brasília	≈ 14 µg/m³	Moderate
Curitiba	≈ 10 µg/m³	Moderate
Recife	≈ 8 µg/m³	Good
Goiânia	≈ 10 µg/m³	Moderate
Belém	≈ 9 µg/m³	Moderate
Porto Alegre	≈ 12 µg/m³	Moderate
Guarulhos	≈ 29 µg/m³	Moderate
Maceió	≈ 11 µg/m³	Moderate
Campinas	≈ 23 µg/m³	Moderate
São Luís	≈ 8 µg/m³	Good
Campo Grande	≈ 9 µg/m³	Good
Natal	≈ 9 µg/m³	Good
Teresina	≈ 11 µg/m³	Moderate
Nova Iguaçu	≈ 9 µg/m³	Moderate
São Bernardo do Campo	≈ 29 µg/m³	Moderate
João Pessoa	≈ 8 µg/m³	Good
Sorocaba	≈ 14 µg/m³	Moderate
Uberlândia	≈ 9 µg/m³	Moderate
Osasco	≈ 28 µg/m³	Moderate
São José dos Campos	≈ 5 µg/m³	Good
Ribeirão Preto	≈ 33 µg/m³	Moderate
Aracaju	≈ 8 µg/m³	Good
Joinville	≈ 9 µg/m³	Moderate
Santo André	≈ 29 µg/m³	Moderate
Jaboatão dos Guararapes	≈ 16 µg/m³	Moderate
Contagem	≈ 8 µg/m³	Good
Cuiabá	≈ 10 µg/m³	Moderate
Feira de Santana	≈ 11 µg/m³	Moderate
Londrina	≈ 19 µg/m³	Moderate
Porto Velho	≈ 26 µg/m³	Moderate
Juiz de Fora	≈ 4 µg/m³	Good
Ananindeua	≈ 8 µg/m³	Good
Aparecida de Goiânia	≈ 10 µg/m³	Moderate
Serra	≈ 8 µg/m³	Good
Belford Roxo	≈ 9 µg/m³	Moderate

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SmogRank, most polluted cities in Brazil, PM2.5, last 7 days to 1 Oct 2026, 23:00 UTC, smogrank.com/br?w=7d.

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Updated 2026-10-01 23:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.