Worst air pollution São Borja, today and tomorrow
Today (16 July): Air quality in São Borja is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (O3: 14.9/100).
Tomorrow (17 July 2026): Air quality in São Borja is good. All pollutants stay as today. Pollution peaks around 1:00 AM (O3: 14.8/100). 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 Borja's air quality reflects the Rio Grande do Sul western border at the Uruguay River opposite Argentina, with consistent southerly Pampas winds providing generally good natural ventilation across this historic Jesuit mission city. Vehicle emissions from the BR-285 and the cross-border river traffic contribute local sources, while the open Pampa landscape and consistent southwesterly winds generally maintain São Borja among Rio Grande do Sul's more moderate border region urban environments throughout most of the year.
Today - 16 July | Pollution peaks at 23:00
AQI:
Good
14.9/100
PM2.5 (fine particles):
Good
10.6/100
PM10 (coarse particles):
Good
4.8/100
NO2 (nitrogen dioxide):
Good
0.4/100
O3 (ozone):
Good
14.9/100
SO2 (sulfur dioxide):
Good
1.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.6/100
PM1 (ultrafine particles):
Good
2.2/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 01:00
AQI:
Good
14.8/100
PM2.5 (fine particles):
Good
10.2/100
PM10 (coarse particles):
Good
4.6/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Good
14.8/100
SO2 (sulfur dioxide):
Good
1.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.5/100
PM1 (ultrafine particles):
Good
1.9/100
Pollen forecast in São Borja
View pollen forecastFrequently Asked Questions
Is air quality bad in São Borja right now?
On 16 July 2026, overall air quality in São Borja is good. AQI is the main air quality indicator at 14.9/100. Pollution peaks around 11:00 PM (O3: 14.9/100).
Will air quality be worse tomorrow in São Borja?
On 17 July 2026, air quality conditions in São Borja will be similar to today, with AQI forecast at good at 14.8/100. Pollution peaks around 1:00 AM (O3: 14.8/100).
When is air pollution at its worst in São Borja?
Air quality dips in São Borja mostly track eucalyptus and riparian gallery forest along the Uruguay River pollen peaks and periods of vehicle emissions from the BR-285 and the cross-border river traffic; a change of season or a spell of wind usually clears things up again.
Are air quality levels in São Borja 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