Worst air pollution Nova Friburgo, today and tomorrow
Today (20 September): Air quality in Nova Friburgo is moderate. AQI and PM2.5 are moderate; PM10 and PM1 are fair; NO2, O3, SO2, CO, and HCHO are good. Pollution peaks around 10:00 AM (PM2.5: 44.5/100).
Tomorrow (21 September 2026): Air quality in Nova Friburgo is moderate. PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 1:00 AM (PM2.5: 42.8/100). Airmine updates local air quality forecasts four times daily.
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Nova Friburgo's air quality benefits from its elevated position in the Serra dos Órgãos at 846 metres in the Rio de Janeiro mountain region, with the consistent cloud forest moisture and Atlantic trade winds providing relatively clean conditions compared to coastal Rio. Vehicle emissions from the RJ-116 and the surrounding textile and technology industry are the primary local sources, while the mountain valley topography creates strong diurnal ventilation patterns and the elevated position provides generally cleaner background air than lowland Rio de Janeiro.
Today - 20 September | Pollution peaks at 10:00
AQI:
Moderate
44.5/100
PM2.5 (fine particles):
Moderate
44.5/100
PM10 (coarse particles):
Fair
35.8/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Good
14.4/100
SO2 (sulfur dioxide):
Good
0.2/100
CO (carbon monoxide):
Good
0.3/100
HCHO (formaldehyde):
Good
0.5/100
PM1 (ultrafine particles):
Fair
22.2/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 01:00
AQI:
Moderate
42.8/100
PM2.5 (fine particles):
Moderate
42.8/100
PM10 (coarse particles):
Fair
29.1/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Good
14.4/100
SO2 (sulfur dioxide):
Good
0.3/100
CO (carbon monoxide):
Good
0.3/100
HCHO (formaldehyde):
Good
0.5/100
PM1 (ultrafine particles):
Good
17.1/100
Pollen forecast in Nova Friburgo
View pollen forecastFrequently Asked Questions
Is air quality bad in Nova Friburgo right now?
On 20 September 2026, overall air quality in Nova Friburgo is moderate. AQI is the main air quality indicator at 44.5/100. Pollution peaks around 10:00 AM (PM2.5: 44.5/100).
Will air quality be worse tomorrow in Nova Friburgo?
On 21 September 2026, air quality conditions in Nova Friburgo will be similar to today, with AQI forecast at moderate at 42.8/100. Pollution peaks around 1:00 AM (PM2.5: 42.8/100).
When is air pollution at its worst in Nova Friburgo?
You're most likely to notice worse air in Nova Friburgo when native Atlantic Forest remnants and highland campo vegetation pollen peaks, or due to vehicle emissions from the RJ-116 and the surrounding textile and technology industry; beyond that, the area's natural ventilation keeps air quality consistently favourable through the rest of the year.
Are air quality levels in Nova Friburgo 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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 20 September 2026 at 14:33 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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