Worst air pollution Petrópolis, today and tomorrow
Today (16 July): Air quality in Petrópolis is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 PM (O3: 16.0/100).
Tomorrow (17 July 2026): Air quality in Petrópolis is good. All pollutants stay as today. Pollution peaks around 6:00 PM (O3: 16.9/100). 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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Petrópolis' air quality reflects its position in the Serra dos Órgãos mountain valley at 838 metres above Rio de Janeiro, with the enclosed highland valley topography creating significant topographic concentration of vehicle emissions from the BR-040 and tourist traffic corridors. The elevated forested mountain setting provides generally cleaner background air than coastal Rio, while the valley's enclosed character concentrates local emissions under calm conditions in this historic imperial summer capital.
Today - 16 July | Pollution peaks at 23:00
AQI:
Good
16.0/100
PM2.5 (fine particles):
Good
6.9/100
PM10 (coarse particles):
Good
3.1/100
NO2 (nitrogen dioxide):
Good
0.0/100
O3 (ozone):
Good
16.0/100
SO2 (sulfur dioxide):
Good
0.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.4/100
PM1 (ultrafine particles):
Good
1.2/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 18:00
AQI:
Good
16.9/100
PM2.5 (fine particles):
Good
7.0/100
PM10 (coarse particles):
Good
3.1/100
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
0.4/100
PM1 (ultrafine particles):
Good
1.7/100
Pollen forecast in Petrópolis
View pollen forecastFrequently Asked Questions
Is air quality bad in Petrópolis right now?
On 16 July 2026, overall air quality in Petrópolis is good. AQI is the main air quality indicator at 16.0/100. Pollution peaks around 11:00 PM (O3: 16.0/100).
Will air quality be worse tomorrow in Petrópolis?
On 17 July 2026, air quality conditions in Petrópolis will be similar to today, with AQI forecast at good at 16.9/100. Pollution peaks around 6:00 PM (O3: 16.9/100).
When is air pollution at its worst in Petrópolis?
The most noticeable dips in Petrópolis's air quality come when native Atlantic Forest remnants and introduced European ornamental trees pollen peaks, or because of the enclosed highland valley topography; a shift to wetter or windier weather typically brings noticeable relief.
Are air quality levels in Petrópolis 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