Worst air pollution São Leopoldo, today and tomorrow
Today (16 July): Air quality in São Leopoldo is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (O3: 13.8/100).
Tomorrow (17 July 2026): Air quality in São Leopoldo is good. All pollutants stay as today. Pollution peaks around 12:00 AM (O3: 13.8/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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São Leopoldo's air quality reflects its position in the greater Porto Alegre metropolitan area's northern industrial corridor in the Vale dos Sinos leather and footwear manufacturing region, with tannery and leather processing operations generating elevated VOCs, ammonia, and PM2.5 alongside vehicle traffic on the RS-020. The flat Sinos river valley provides limited dispersal, while the tanning industry's distinctive chemical emissions make the Vale dos Sinos corridor one of southern Brazil's more chemically complex air quality environments.
Today - 16 July | Pollution peaks at 23:00
AQI:
Good
13.8/100
PM2.5 (fine particles):
Good
13.1/100
PM10 (coarse particles):
Good
6.1/100
NO2 (nitrogen dioxide):
Good
0.5/100
O3 (ozone):
Good
13.8/100
SO2 (sulfur dioxide):
Good
2.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.6/100
PM1 (ultrafine particles):
Good
2.6/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 00:00
AQI:
Good
13.8/100
PM2.5 (fine particles):
Good
13.2/100
PM10 (coarse particles):
Good
6.2/100
NO2 (nitrogen dioxide):
Good
0.5/100
O3 (ozone):
Good
13.8/100
SO2 (sulfur dioxide):
Good
1.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.5/100
PM1 (ultrafine particles):
Good
2.3/100
Pollen forecast in São Leopoldo
View pollen forecastFrequently Asked Questions
Is air quality bad in São Leopoldo right now?
On 16 July 2026, overall air quality in São Leopoldo is good. AQI is the main air quality indicator at 13.8/100. Pollution peaks around 11:00 PM (O3: 13.8/100).
Will air quality be worse tomorrow in São Leopoldo?
On 17 July 2026, air quality conditions in São Leopoldo will be similar to today, with AQI forecast at good at 13.8/100. Pollution peaks around 12:00 AM (O3: 13.8/100).
When is air pollution at its worst in São Leopoldo?
The most noticeable dips in São Leopoldo's air quality come when eucalyptus and native Atlantic Forest remnants pollen peaks, or because of tannery and leather processing operations; conditions generally improve once the season shifts and rainfall or stronger winds return.
Are air quality levels in São Leopoldo 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: 16 July 2026 at 10:33 CEST (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