Worst air pollution Trois-Rivières, today and tomorrow
Today (16 July): Air quality in Trois-Rivières is fair. NO2 is fair; AQI and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 AM (O3: 41.5/100).
Tomorrow (17 July 2026): Air quality in Trois-Rivières is fair. AQI worsens 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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Trois-Rivières' air quality reflects its historic pulp and paper mill industry at the river confluence, with legacy industrial operations and vehicle traffic on Highway 40 contributing local sources.
Today - 16 July | Pollution peaks at 07:00
AQI:
Medium
41.5/100
PM2.5 (fine particles):
Good
12.2/100
PM10 (coarse particles):
Good
4.2/100
NO2 (nitrogen dioxide):
Fair
36.6/100
O3 (ozone):
Medium
41.5/100
SO2 (sulfur dioxide):
Good
2.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.1/100
PM1 (ultrafine particles):
Good
14.0/100
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
7.3/100
PM10 (coarse particles):
Good
2.8/100
NO2 (nitrogen dioxide):
Fair
24.5/100
O3 (ozone):
Fair
33.1/100
SO2 (sulfur dioxide):
Good
1.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.0/100
PM1 (ultrafine particles):
Good
8.3/100
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Frequently Asked Questions
Is air quality bad in Trois-Rivières right now?
On 16 July 2026, overall air quality in Trois-Rivières is fair. NO2 is the main pollutant at 36.6/100. Pollution peaks around 7:00 AM (O3: 41.5/100).
Will air quality be worse tomorrow in Trois-Rivières?
On 17 July 2026, air quality conditions in Trois-Rivières will be similar to 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 Trois-Rivières?
Trois-Rivières sees clear seasonal swings in air quality, driven in part by its pulp-and-paper mills along the St. Lawrence River. Air quality here tends to dip in summer, when heat and industrial output combine, and again briefly in winter when cold, calm air traps emissions near ground level. Wind direction off the harbour plays a large role in how far pollutants travel into surrounding neighbourhoods.
Are air quality levels in Trois-Rivières 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