Worst air pollution Sobral, today and tomorrow
Today (16 July): Air quality in Sobral is fair. O3 is fair; AQI, PM2.5, PM10, and PM1 are medium; NO2, SO2, CO, and HCHO are good. Pollution peaks around 9:00 AM (PM2.5: 54.7/100).
Tomorrow (17 July 2026): Air quality in Sobral is poor. AQI worsens to poor; PM2.5 increases to poor; SO2 increases to fair; all other pollutants stay as today. Pollution peaks around 5:00 PM (PM2.5: 70.2/100). 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 - 16 July | Pollution peaks at 09:00
AQI:
Medium
54.7/100
PM2.5 (fine particles):
Medium
54.7/100
PM10 (coarse particles):
Medium
40.2/100
NO2 (nitrogen dioxide):
Good
0.9/100
O3 (ozone):
Fair
22.1/100
SO2 (sulfur dioxide):
Good
19.7/100
CO (carbon monoxide):
Good
0.1/100
HCHO (formaldehyde):
Good
0.6/100
PM1 (ultrafine particles):
Medium
40.4/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 17:00
AQI:
Poor
70.2/100
PM2.5 (fine particles):
Poor
70.2/100
PM10 (coarse particles):
Medium
47.2/100
NO2 (nitrogen dioxide):
Good
1.3/100
O3 (ozone):
Fair
23.3/100
SO2 (sulfur dioxide):
Fair
21.9/100
CO (carbon monoxide):
Good
0.1/100
HCHO (formaldehyde):
Good
0.7/100
PM1 (ultrafine particles):
Medium
55.7/100
Pollen forecast in Sobral
View pollen forecastFrequently Asked Questions
Is air quality bad in Sobral right now?
On 16 July 2026, overall air quality in Sobral is fair. O3 is the main pollutant at 22.1/100. Pollution peaks around 9:00 AM (PM2.5: 54.7/100).
Will air quality be worse tomorrow in Sobral?
On 17 July 2026, air quality conditions in Sobral will be worse than today, with AQI forecast at poor at 70.2/100. Pollution peaks around 5:00 PM (PM2.5: 70.2/100).
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.
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