Highest air pollution Porto Alegre, today and tomorrow
Today (28 June): Air quality in Porto Alegre is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 PM (O3: 16.9/100).
Tomorrow (29 June 2026): Air quality in Porto Alegre is good. All pollutants stay as today. Pollution peaks around 11:00 PM (O3: 17.0/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Porto Alegre's air quality reflects its position at the northern end of the Lagoa dos Patos, with prevailing southerly winds from the Pampas providing generally good ventilation across this southernmost major Brazilian city. Vehicle emissions from the dense metropolitan road network are the primary source, while winter thermal inversions can temporarily trap emissions on calm cold days.
Today - 28 June | Pollution peaks at 13:00
AQI:
Good
16.9/100
PM2.5 (fine particles):
Good
10.2/100
PM10 (coarse particles):
Good
4.7/100
NO2 (nitrogen dioxide):
Good
0.0/100
O3 (ozone):
Good
16.9/100
SO2 (sulfur dioxide):
Good
0.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.2/100
PM1 (ultrafine particles):
Good
1.0/100
Levels show the poorest local air quality during the day
Tomorrow - 29 June | Pollution peaks at 23:00
AQI:
Good
17.0/100
PM2.5 (fine particles):
Good
5.5/100
PM10 (coarse particles):
Good
2.5/100
NO2 (nitrogen dioxide):
Good
0.0/100
O3 (ozone):
Good
17.0/100
SO2 (sulfur dioxide):
Good
0.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.3/100
PM1 (ultrafine particles):
Good
0.5/100
Pollen forecast in Porto Alegre
View pollen forecastFrequently Asked Questions
Is air quality bad in Porto Alegre right now?
On 28 June 2026, overall air quality in Porto Alegre is good. AQI is the main air quality indicator at 16.9/100. Pollution peaks around 1:00 PM (O3: 16.9/100).
Will air quality be worse tomorrow in Porto Alegre?
On 29 June 2026, air quality conditions in Porto Alegre will be similar to today, with AQI forecast at good at 17.0/100. Pollution peaks around 11:00 PM (O3: 17.0/100).
Are air quality levels in Porto Alegre based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
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Data provided by Airmine — Last update: 28 June 2026 at 18:36 CET (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team