Worst air pollution Teresina, today and tomorrow
Today (16 July): Air quality in Teresina is fair. AQI, PM2.5, and O3 are fair; PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 AM (O3: 22.1/100).
Tomorrow (17 July 2026): Air quality in Teresina is fair. PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 6:00 PM (PM2.5: 34.1/100). 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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Teresina's air quality reflects its position in the semi-arid Piauí interior, with vehicle emissions from the growing metropolitan area combining with dry season burning from surrounding Cerrado and Caatinga agricultural activity. The flat interior position away from coastal Atlantic breezes means Teresina is more susceptible to dry season smoke accumulation than Brazil's coastal northeastern cities.
Today - 16 July | Pollution peaks at 03:00
AQI:
Fair
22.1/100
PM2.5 (fine particles):
Fair
21.5/100
PM10 (coarse particles):
Good
9.3/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Fair
22.1/100
SO2 (sulfur dioxide):
Good
2.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.6/100
PM1 (ultrafine particles):
Good
9.9/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 18:00
AQI:
Fair
34.1/100
PM2.5 (fine particles):
Fair
34.1/100
PM10 (coarse particles):
Good
13.8/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Fair
24.3/100
SO2 (sulfur dioxide):
Good
2.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.6/100
PM1 (ultrafine particles):
Fair
22.1/100
Pollen forecast in Teresina
View pollen forecastFrequently Asked Questions
Is air quality bad in Teresina right now?
On 16 July 2026, overall air quality in Teresina is fair. AQI is the main air quality indicator at 22.1/100. Pollution peaks around 3:00 AM (O3: 22.1/100).
Will air quality be worse tomorrow in Teresina?
On 17 July 2026, air quality conditions in Teresina will be similar to today, with AQI forecast at fair at 34.1/100. Pollution peaks around 6:00 PM (PM2.5: 34.1/100).
When is air pollution at its worst in Teresina?
Reduced air quality in Teresina is most likely when native Caatinga species including carnaúba palm and aroeira pollen peaks, alongside periods of vehicle emissions from the growing metropolitan area; conditions generally improve once the season shifts and rainfall or stronger winds return.
Are air quality levels in Teresina 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