What is the air quality in Porto Alegre?

Porto Alegre, Brazil has an annual US AQI of 56 (Reasonable) and average PM2.5 of 12.2 µg/m³, ranking #1471 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Porto Alegre?

January is typically the cleanest month (AQI 53) and June the most polluted (AQI 62).

PM2.5: 1998–2025 (monitors 2024–2025, satellite 1998–2024). Measured by government monitoring stations. Full sources are on the methodology page.

Global rank	City	Continent	AQI	PM2.5
1471	Porto Alegre, Brazil	South America	AQI 56	PM2.5 12.2 µg/m³