Worst air pollution São João del Rei, today and tomorrow
Today (16 July): Air quality in São João del Rei is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 PM (O3: 16.4/100).
Tomorrow (17 July 2026): Air quality in São João del Rei is good. All pollutants stay as today. Pollution peaks around 9:00 PM (O3: 17.0/100). 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 João del Rei's air quality benefits from its elevated position in the Minas Gerais highlands at 905 metres, with vehicle emissions from the BR-265 and surrounding tourism, university, and light manufacturing contributing modest local sources in this major Baroque heritage city. The elevated Serra da Canastra foothills position aids background dispersal, while the relatively low industrial base and surrounding Atlantic Forest remnants generally maintain good baseline conditions.
Today - 16 July | Pollution peaks at 21:00
AQI:
Good
16.4/100
PM2.5 (fine particles):
Good
16.1/100
PM10 (coarse particles):
Good
7.3/100
NO2 (nitrogen dioxide):
Good
0.0/100
O3 (ozone):
Good
16.4/100
SO2 (sulfur dioxide):
Good
1.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.4/100
PM1 (ultrafine particles):
Good
2.8/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 21:00
AQI:
Good
17.0/100
PM2.5 (fine particles):
Good
14.3/100
PM10 (coarse particles):
Good
6.5/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Good
17.0/100
SO2 (sulfur dioxide):
Good
1.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.4/100
PM1 (ultrafine particles):
Good
3.5/100
Pollen forecast in São João del Rei
View pollen forecastFrequently Asked Questions
Is air quality bad in São João del Rei right now?
On 16 July 2026, overall air quality in São João del Rei is good. AQI is the main air quality indicator at 16.4/100. Pollution peaks around 9:00 PM (O3: 16.4/100).
Will air quality be worse tomorrow in São João del Rei?
On 17 July 2026, air quality conditions in São João del Rei will be similar to today, with AQI forecast at good at 17.0/100. Pollution peaks around 9:00 PM (O3: 17.0/100).
When is air pollution at its worst in São João del Rei?
Residents in São João del Rei are most likely to notice reduced air quality when eucalyptus and the Lenheiro River corridor vegetation pollen peaks, or due to vehicle emissions from the BR-265 and surrounding tourism, university, and light manufacturing; otherwise, the area's setting generally supports clear, well-ventilated conditions.
Are air quality levels in São João del Rei 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