Worst air pollution Sainte-Marie, today and tomorrow
Today (16 July): Air quality in Sainte-Marie is medium. AQI, NO2, and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 AM (NO2: 44.3/100).
Tomorrow (17 July 2026): Air quality in Sainte-Marie is fair. AQI worsens to fair; NO2 increases to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 11:00 AM (O3: 33.1/100). 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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Sainte-Marie's air quality benefits from the rolling Beauce region farmland surrounding this small city, with agricultural operations and vehicle traffic on Highway 73 the primary local sources.
Today - 16 July | Pollution peaks at 01:00
AQI:
Medium
44.3/100
PM2.5 (fine particles):
Good
14.1/100
PM10 (coarse particles):
Good
4.9/100
NO2 (nitrogen dioxide):
Medium
44.3/100
O3 (ozone):
Medium
41.5/100
SO2 (sulfur dioxide):
Good
3.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.1/100
PM1 (ultrafine particles):
Good
16.3/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 11:00
AQI:
Fair
33.1/100
PM2.5 (fine particles):
Good
8.4/100
PM10 (coarse particles):
Good
3.2/100
NO2 (nitrogen dioxide):
Fair
32.8/100
O3 (ozone):
Fair
33.1/100
SO2 (sulfur dioxide):
Good
2.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.0/100
PM1 (ultrafine particles):
Good
9.6/100
Pollen forecast in Sainte-Marie
View pollen forecastFrequently Asked Questions
Is air quality bad in Sainte-Marie right now?
On 16 July 2026, overall air quality in Sainte-Marie is medium. AQI is the main air quality indicator at 44.3/100. Pollution peaks around 1:00 AM (NO2: 44.3/100).
Will air quality be worse tomorrow in Sainte-Marie?
On 17 July 2026, air quality conditions in Sainte-Marie will be worse than today, with AQI forecast at fair at 33.1/100. Pollution peaks around 11:00 AM (O3: 33.1/100).
When is air pollution at its worst in Sainte-Marie?
Air quality in Sainte-Marie shifts noticeably across the seasons, shaped by farmland of the Beauce region along the Chaudiere River. Air quality is generally good, though spring and fall fieldwork stir up dust and occasional agricultural burning, and summer humidity can trap haze close to the ground. Wind can carry dust well beyond the fields themselves during the busiest planting and harvest weeks.
Are air quality levels in Sainte-Marie 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