Worst air pollution Imperatriz, today and tomorrow
Today (16 July): Air quality in Imperatriz is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 AM (O3: 22.0/100).
Tomorrow (17 July 2026): Air quality in Imperatriz is fair. PM2.5 increases to fair; all other pollutants stay as today. Pollution peaks around 6:00 PM (PM2.5: 26.1/100). 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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Imperatriz's air quality faces severe seasonal challenges as one of Maranhão's largest cities at the gateway to the Amazon-Cerrado transition zone, with dry season burning from surrounding deforestation generating intense PM2.5 episodes between June and October. Vehicle emissions from the BR-010 Belém-Brasília highway corridor contribute year-round, while the flat Tocantins river plain's calm dry season conditions allow smoke to accumulate across the entire western Maranhão region.
Today - 16 July | Pollution peaks at 04:00
AQI:
Fair
22.0/100
PM2.5 (fine particles):
Good
17.2/100
PM10 (coarse particles):
Good
7.3/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Fair
22.0/100
SO2 (sulfur dioxide):
Good
1.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.6/100
PM1 (ultrafine particles):
Good
8.3/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 18:00
AQI:
Fair
26.1/100
PM2.5 (fine particles):
Fair
26.1/100
PM10 (coarse particles):
Good
10.4/100
NO2 (nitrogen dioxide):
Good
0.1/100
O3 (ozone):
Fair
24.5/100
SO2 (sulfur dioxide):
Good
1.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.6/100
PM1 (ultrafine particles):
Good
16.5/100
Pollen forecast in Imperatriz
View pollen forecastFrequently Asked Questions
Is air quality bad in Imperatriz right now?
On 16 July 2026, overall air quality in Imperatriz is fair. AQI is the main air quality indicator at 22.0/100. Pollution peaks around 4:00 AM (O3: 22.0/100).
Will air quality be worse tomorrow in Imperatriz?
On 17 July 2026, air quality conditions in Imperatriz will be similar to today, with AQI forecast at fair at 26.1/100. Pollution peaks around 6:00 PM (PM2.5: 26.1/100).
When is air pollution at its worst in Imperatriz?
Air quality dips in Imperatriz mostly track native cerrado trees and secondary Amazon forest pollen peaks and periods of dry season burning from surrounding deforestation; background levels usually settle back down once the season changes.
Are air quality levels in Imperatriz 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