Worst air pollution Açailandia, today and tomorrow
Today (16 July): Air quality in Açailandia is fair. AQI, PM2.5, and O3 are fair; PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 AM (PM2.5: 35.2/100).
Tomorrow (17 July 2026): Air quality in Açailandia is fair. AQI improves to medium; PM2.5 decreases to medium; PM10 increases to fair; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 7:00 PM (PM2.5: 44.6/100). 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
Use our Strava plugin to check your own exposure.
Açailândia's air quality faces significant industrial challenges as a major Maranhão steel and pig iron production hub, with the Gusa Nordeste and surrounding pig iron furnaces generating elevated PM2.5, CO, and heavy metals from charcoal-fired blast furnaces alongside dry season burning from surrounding Amazon deforestation. The flat Maranhão-Pará border terrain and calm dry season conditions allow both industrial and fire smoke to accumulate extensively.
Today - 16 July | Pollution peaks at 03:00
AQI:
Fair
35.2/100
PM2.5 (fine particles):
Fair
35.2/100
PM10 (coarse particles):
Good
15.9/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Fair
22.0/100
SO2 (sulfur dioxide):
Good
5.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.6/100
PM1 (ultrafine particles):
Good
16.6/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 19:00
AQI:
Medium
44.6/100
PM2.5 (fine particles):
Medium
44.6/100
PM10 (coarse particles):
Fair
23.4/100
NO2 (nitrogen dioxide):
Good
0.3/100
O3 (ozone):
Fair
24.2/100
SO2 (sulfur dioxide):
Good
5.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.6/100
PM1 (ultrafine particles):
Fair
35.6/100
Pollen forecast in Açailandia
View pollen forecastFrequently Asked Questions
Is air quality bad in Açailandia right now?
On 16 July 2026, overall air quality in Açailandia is fair. AQI is the main air quality indicator at 35.2/100. Pollution peaks around 3:00 AM (PM2.5: 35.2/100).
Will air quality be worse tomorrow in Açailandia?
On 17 July 2026, air quality conditions in Açailandia will be similar to today, with PM1 forecast at fair at 35.6/100. Pollution peaks around 7:00 PM (PM2.5: 44.6/100).
When is air pollution at its worst in Açailandia?
In Açailandia, reduced air quality is most noticeable when native cerrado trees and eucalyptus pollen peaks, and on days affected by the Gusa Nordeste and surrounding pig iron furnaces; conditions usually ease once the wet season or windier weather returns.
Are air quality levels in Açailandia 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?
Check air quality in other popular cities:
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