Worst air pollution Sobral, today and tomorrow
Today (9 August): Air quality in Sobral is fair. PM10 and PM1 are fair; AQI and PM2.5 are medium; NO2, O3, SO2, CO, and HCHO are good. Pollution peaks around 11:00 PM (PM2.5: 47.1/100).
Tomorrow (10 August 2026): Air quality in Sobral is fair. PM10 decreases to medium; O3 increases to fair; PM1 decreases to medium; all other pollutants stay as today. Pollution peaks around 5:00 PM (PM2.5: 59.8/100). 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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Sobral's air quality reflects its position in the Ceará semi-arid interior near the Acaraú river valley, with vehicle emissions from the BR-222 and the surrounding light industrial and agricultural base contributing local sources. The flat Ceará sertão generally provides reasonable wind dispersal on most days, while drought conditions and dry season burning from surrounding semi-arid Caatinga landscape contribute elevated PM10 and PM2.5 episodes, and the lack of consistent Atlantic trade wind penetration makes Sobral more susceptible to dry season smoke accumulation than coastal Ceará cities.
Today - 9 August | Pollution peaks at 23:00
AQI:
Medium
47.1/100
PM2.5 (fine particles):
Medium
47.1/100
PM10 (coarse particles):
Fair
31.0/100
NO2 (nitrogen dioxide):
Good
0.8/100
O3 (ozone):
Good
19.6/100
SO2 (sulfur dioxide):
Good
16.4/100
CO (carbon monoxide):
Good
0.1/100
HCHO (formaldehyde):
Good
0.6/100
PM1 (ultrafine particles):
Fair
22.2/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 17:00
AQI:
Medium
59.8/100
PM2.5 (fine particles):
Medium
59.8/100
PM10 (coarse particles):
Medium
42.5/100
NO2 (nitrogen dioxide):
Good
1.2/100
O3 (ozone):
Fair
20.2/100
SO2 (sulfur dioxide):
Good
18.6/100
CO (carbon monoxide):
Good
0.1/100
HCHO (formaldehyde):
Good
0.6/100
PM1 (ultrafine particles):
Medium
45.0/100
Pollen forecast in Sobral
View pollen forecastFrequently Asked Questions
Is air quality bad in Sobral right now?
On 9 August 2026, overall air quality in Sobral is fair. PM10 is the main pollutant at 31.0/100. Pollution peaks around 11:00 PM (PM2.5: 47.1/100).
Will air quality be worse tomorrow in Sobral?
On 10 August 2026, air quality conditions in Sobral will be similar to today, with O3 forecast at fair at 20.2/100. Pollution peaks around 5:00 PM (PM2.5: 59.8/100).
When is air pollution at its worst in Sobral?
You're most likely to notice worse air in Sobral when carnauba wax palm and introduced urban trees pollen peaks, or due to vehicle emissions from the BR-222 and the surrounding light industrial and agricultural base; the picture usually improves again once the season turns.
Are air quality levels in Sobral 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: 9 August 2026 at 20:27 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.
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