Worst air pollution Niterói, today and tomorrow
Today (16 July): Air quality in Niterói is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 PM (O3: 16.0/100).
Tomorrow (17 July 2026): Air quality in Niterói is good. All pollutants stay as today. Pollution peaks around 11:00 PM (O3: 16.8/100). 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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Niterói's air quality benefits from its position across Guanabara Bay from Rio de Janeiro, with consistent Atlantic and bay breezes providing ventilation along the eastern shoreline. The primary concerns are industrial emissions crossing the bay from Rio's petrochemical complex and vehicle traffic on the BR-101 corridor, while the coastal position generally offers cleaner conditions than Rio's western industrial suburbs.
Today - 16 July | Pollution peaks at 19:00
AQI:
Good
16.0/100
PM2.5 (fine particles):
Good
6.4/100
PM10 (coarse particles):
Good
2.9/100
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
1.1/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 23:00
AQI:
Good
16.8/100
PM2.5 (fine particles):
Good
8.2/100
PM10 (coarse particles):
Good
3.6/100
NO2 (nitrogen dioxide):
Good
0.0/100
O3 (ozone):
Good
16.8/100
SO2 (sulfur dioxide):
Good
0.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.4/100
PM1 (ultrafine particles):
Good
1.6/100
Pollen forecast in Niterói
View pollen forecastFrequently Asked Questions
Is air quality bad in Niterói right now?
On 16 July 2026, overall air quality in Niterói is good. AQI is the main air quality indicator at 16.0/100. Pollution peaks around 7:00 PM (O3: 16.0/100).
Will air quality be worse tomorrow in Niterói?
On 17 July 2026, air quality conditions in Niterói will be similar to today, with AQI forecast at good at 16.8/100. Pollution peaks around 11:00 PM (O3: 16.8/100).
When is air pollution at its worst in Niterói?
You're most likely to notice worse air in Niterói when native Atlantic Forest species including ficus and mango pollen peaks, or due to the primary concerns are industrial emissions crossing the bay from Rio's petrochemical complex; outside of those periods, conditions here remain among the more favourable in the region.
Are air quality levels in Niterói 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.
Want to see air quality forecasts for other cities in Brazil?
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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