Worst air pollution Vieux-Trois-Rivieres - Trois-Rivières, today and tomorrow
Today (16 July): Air quality in Vieux-Trois-Rivieres 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 Vieux-Trois-Rivieres 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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Vieux-Trois-Rivières' air quality benefits from its St. Lawrence River shoreline position, with river breezes providing reasonable ventilation, though the region's paper-mill legacy affects background levels.
Today - 16 July | Pollution peaks at 07:00
AQI:
Medium
41.5/100
PM2.5 (fine particles):
Good
11.3/100
PM10 (coarse particles):
Good
3.9/100
NO2 (nitrogen dioxide):
Fair
30.6/100
O3 (ozone):
Medium
41.5/100
SO2 (sulfur dioxide):
Good
1.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.1/100
PM1 (ultrafine particles):
Good
13.0/100
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
6.7/100
PM10 (coarse particles):
Good
2.6/100
NO2 (nitrogen dioxide):
Fair
20.8/100
O3 (ozone):
Fair
33.1/100
SO2 (sulfur dioxide):
Good
1.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.0/100
PM1 (ultrafine particles):
Good
7.7/100
Other Landmarks in Trois-Rivières
Sports venues in Trois-Rivières
Frequently Asked Questions
Is air quality bad in Vieux-Trois-Rivieres right now?
On 16 July 2026, overall air quality in Vieux-Trois-Rivieres is fair. NO2 is the main pollutant at 30.6/100. Pollution peaks around 7:00 AM (O3: 41.5/100).
Will air quality be worse tomorrow in Vieux-Trois-Rivieres?
On 17 July 2026, air quality conditions in Vieux-Trois-Rivieres 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 Vieux-Trois-Rivieres?
Vieux-Trois-Rivières's air quality follows a seasonal rhythm tied to its historic riverside core amid the city's pulp-and-paper mills. Summer heat can worsen conditions when plant emissions combine with sunlight to form ground-level ozone, while winter inversions occasionally trap industrial pollutants close to the ground on still, cold days. Wind direction off the harbour plays a large role in how far pollutants travel into surrounding neighbourhoods.
Are air quality levels in Vieux-Trois-Rivieres 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