SmogRank / World / South America / Brazil / Rio Grande do Sul

Most polluted cities in Rio Grande do Sul, Brazil

No city in Rio Grande do Sul, Brazil has enough readings to rank so far this year.

A city joins this ranking with enough days of readings so far this year; none here has that right now, so there is nothing to map or chart.

Good0–50

Moderate51–100

Sensitive groups101–150

Unhealthy151–200

Very unhealthy201–300

Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Estimated: cities without a monitor

Rio Grande do Sul 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
Porto Alegre	≈ 12 µg/m³	Moderate
Caxias do Sul	≈ 9 µg/m³	Good
Pelotas	≈ 6 µg/m³	Good
Canoas	≈ 12 µg/m³	Moderate
Santa Maria	≈ 8 µg/m³	Good
Gravataí	≈ 10 µg/m³	Moderate
Novo Hamburgo	≈ 13 µg/m³	Moderate
Viamão	≈ 12 µg/m³	Moderate
Passo Fundo	≈ 12 µg/m³	Moderate
São Leopoldo	≈ 13 µg/m³	Moderate
Rio Grande	≈ 9 µg/m³	Good
Alvorada	≈ 12 µg/m³	Moderate
Cachoeirinha	≈ 12 µg/m³	Moderate
Santa Cruz do Sul	≈ 10 µg/m³	Moderate
Sapucaia do Sul	≈ 12 µg/m³	Moderate
Bento Gonçalves	≈ 12 µg/m³	Moderate
Bagé	≈ 5 µg/m³	Good
Uruguaiana	≈ 6 µg/m³	Good
Guaíba	≈ 12 µg/m³	Moderate
Erechim	≈ 16 µg/m³	Moderate
Lajeado	≈ 12 µg/m³	Moderate
Ijuí	≈ 11 µg/m³	Moderate
Cachoeira do Sul	≈ 8 µg/m³	Good
Santo Ângelo	≈ 10 µg/m³	Moderate
Santa Rosa	≈ 10 µg/m³	Moderate
Sant'Ana do Livramento	≈ 5 µg/m³	Good
Esteio	≈ 12 µg/m³	Moderate
Sapiranga	≈ 13 µg/m³	Moderate
Alegrete	≈ 6 µg/m³	Good
Farroupilha	≈ 9 µg/m³	Good
Venâncio Aires	≈ 12 µg/m³	Moderate
Camaquã	≈ 6 µg/m³	Good
Montenegro	≈ 14 µg/m³	Moderate
Vacaria	≈ 7 µg/m³	Good
Capão da Canoa	≈ 10 µg/m³	Moderate
Campo Bom	≈ 13 µg/m³	Moderate
Carazinho	≈ 12 µg/m³	Moderate
São Borja	≈ 7 µg/m³	Good
Cruz Alta	≈ 11 µg/m³	Moderate
São Gabriel	≈ 6 µg/m³	Good

Updated 2026-10-02 08:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.