Worst air pollution Valença, today and tomorrow
Today (16 July): Air quality in Valença is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 PM (O3: 22.0/100).
Tomorrow (17 July 2026): Air quality in Valença is fair. All pollutants stay as today. Pollution peaks around 9:00 PM (O3: 24.0/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Valença's air quality in Brazil reflects the Paraíba do Sul valley in Rio de Janeiro state, with vehicle emissions from the BR-393 and surrounding textile and light manufacturing contributing local sources. The valley's topographic enclosure between surrounding highland ridges creates modest concentration under calm conditions, while Atlantic sea breezes from the nearby coast provide periodic ventilation relief throughout the year.
Today - 16 July | Pollution peaks at 22:00
AQI:
Fair
22.0/100
PM2.5 (fine particles):
Good
10.1/100
PM10 (coarse particles):
Good
4.5/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Fair
22.0/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
0.6/100
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:
Fair
24.0/100
PM2.5 (fine particles):
Good
11.8/100
PM10 (coarse particles):
Good
4.6/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Fair
24.0/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
0.7/100
PM1 (ultrafine particles):
Good
6.4/100
Pollen forecast in Valença
View pollen forecastFrequently Asked Questions
Is air quality bad in Valença right now?
On 16 July 2026, overall air quality in Valença is fair. AQI is the main air quality indicator at 22.0/100. Pollution peaks around 10:00 PM (O3: 22.0/100).
Will air quality be worse tomorrow in Valença?
On 17 July 2026, air quality conditions in Valença will be similar to today, with AQI forecast at fair at 24.0/100. Pollution peaks around 9:00 PM (O3: 24.0/100).
When is air pollution at its worst in Valença?
People in Valença tend to notice reduced air quality when native Atlantic Forest remnants and restinga coastal scrub pollen peaks, or because of vehicle emissions from the BR-393 and surrounding textile and light manufacturing; the picture usually improves again once the season turns.
Are air quality levels in Valença 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