Worst air pollution Saint-Hyacinthe, today and tomorrow
Today (16 July): Air quality in Saint-Hyacinthe is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 AM (O3: 36.7/100).
Tomorrow (17 July 2026): Air quality in Saint-Hyacinthe is fair. All pollutants stay as today. Pollution peaks around 8:00 AM (O3: 30.9/100). 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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Saint-Hyacinthe's air quality benefits from the flat, open Montérégie farmland surrounding this agricultural-hub city, with agricultural operations and vehicle traffic the primary local sources.
Today - 16 July | Pollution peaks at 07:00
AQI:
Fair
36.7/100
PM2.5 (fine particles):
Good
4.6/100
PM10 (coarse particles):
Good
1.8/100
NO2 (nitrogen dioxide):
Good
0.7/100
O3 (ozone):
Fair
36.7/100
SO2 (sulfur dioxide):
Good
0.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.0/100
PM1 (ultrafine particles):
Good
4.3/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 08:00
AQI:
Fair
30.9/100
PM2.5 (fine particles):
Good
5.8/100
PM10 (coarse particles):
Good
2.1/100
NO2 (nitrogen dioxide):
Good
0.7/100
O3 (ozone):
Fair
30.9/100
SO2 (sulfur dioxide):
Good
0.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.9/100
PM1 (ultrafine particles):
Good
5.0/100
Pollen forecast in Saint-Hyacinthe
View pollen forecastFrequently Asked Questions
Is air quality bad in Saint-Hyacinthe right now?
On 16 July 2026, overall air quality in Saint-Hyacinthe is fair. AQI is the main air quality indicator at 36.7/100. Pollution peaks around 7:00 AM (O3: 36.7/100).
Will air quality be worse tomorrow in Saint-Hyacinthe?
On 17 July 2026, air quality conditions in Saint-Hyacinthe will be similar to today, with AQI forecast at fair at 30.9/100. Pollution peaks around 8:00 AM (O3: 30.9/100).
When is air pollution at its worst in Saint-Hyacinthe?
Saint-Hyacinthe's air quality follows a seasonal rhythm tied to the dairy and cash-crop farmland of the Montérégie region. 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 Saint-Hyacinthe 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