Worst air pollution Viana, today and tomorrow
Today (16 July): Air quality in Viana is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 PM (O3: 16.7/100).
Tomorrow (17 July 2026): Air quality in Viana is good. All pollutants stay as today. Pollution peaks around 6:00 AM (O3: 17.4/100). 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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Viana's air quality reflects the Maranhão coastal position on São Marcos Bay, with vehicle emissions from the MA-204 and surrounding agricultural and light industrial operations contributing local sources. Atlantic trade winds generally provide background maritime ventilation, while dry season burning from surrounding Maranhão agricultural land contributes seasonal PM2.5 variation throughout the year.
Today - 16 July | Pollution peaks at 21:00
AQI:
Good
16.7/100
PM2.5 (fine particles):
Good
13.0/100
PM10 (coarse particles):
Good
5.9/100
NO2 (nitrogen dioxide):
Good
0.0/100
O3 (ozone):
Good
16.7/100
SO2 (sulfur dioxide):
Good
0.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.4/100
PM1 (ultrafine particles):
Good
2.1/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 06:00
AQI:
Good
17.4/100
PM2.5 (fine particles):
Good
10.7/100
PM10 (coarse particles):
Good
4.8/100
NO2 (nitrogen dioxide):
Good
0.0/100
O3 (ozone):
Good
17.4/100
SO2 (sulfur dioxide):
Good
0.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.4/100
PM1 (ultrafine particles):
Good
2.6/100
Pollen forecast in Viana
View pollen forecastFrequently Asked Questions
Is air quality bad in Viana right now?
On 16 July 2026, overall air quality in Viana is good. AQI is the main air quality indicator at 16.7/100. Pollution peaks around 9:00 PM (O3: 16.7/100).
Will air quality be worse tomorrow in Viana?
On 17 July 2026, air quality conditions in Viana will be similar to today, with AQI forecast at good at 17.4/100. Pollution peaks around 6:00 AM (O3: 17.4/100).
When is air pollution at its worst in Viana?
Residents in Viana are most likely to notice reduced air quality when native Atlantic Forest remnants and eucalyptus pollen peaks, or due to vehicle emissions from the MA-204 and surrounding agricultural and light industrial operations; conditions generally improve once the season shifts and rainfall or stronger winds return.
Are air quality levels in Viana 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