Worst air pollution Cap-de-la-Madeleine (secteur) - Trois-Rivières, today and tomorrow
Today (16 July): Air quality in Cap-de-la-Madeleine (secteur) 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: 46.0/100).
Tomorrow (17 July 2026): Air quality in Cap-de-la-Madeleine (secteur) 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 PM (NO2: 35.1/100). 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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The Cap-de-la-Madeleine sector's air quality reflects its position within greater Trois-Rivières on the St. Lawrence, with vehicle traffic and the region's paper-mill legacy contributing local sources.
Today - 16 July | Pollution peaks at 01:00
AQI:
Medium
46.0/100
PM2.5 (fine particles):
Good
14.7/100
PM10 (coarse particles):
Good
5.1/100
NO2 (nitrogen dioxide):
Medium
46.0/100
O3 (ozone):
Medium
41.5/100
SO2 (sulfur dioxide):
Good
3.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.1/100
PM1 (ultrafine particles):
Good
16.9/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 23:00
AQI:
Fair
35.1/100
PM2.5 (fine particles):
Good
8.8/100
PM10 (coarse particles):
Good
3.4/100
NO2 (nitrogen dioxide):
Fair
35.1/100
O3 (ozone):
Fair
33.1/100
SO2 (sulfur dioxide):
Good
2.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.0/100
PM1 (ultrafine particles):
Good
10.0/100
Other Landmarks in Trois-Rivières
Sports venues in Trois-Rivières
Frequently Asked Questions
Is air quality bad in Cap-de-la-Madeleine (secteur) right now?
On 16 July 2026, overall air quality in Cap-de-la-Madeleine (secteur) is medium. AQI is the main air quality indicator at 46.0/100. Pollution peaks around 1:00 AM (NO2: 46.0/100).
Will air quality be worse tomorrow in Cap-de-la-Madeleine (secteur)?
On 17 July 2026, air quality conditions in Cap-de-la-Madeleine (secteur) will be worse than today, with AQI forecast at fair at 35.1/100. Pollution peaks around 11:00 PM (NO2: 35.1/100).
When is air pollution at its worst in Cap-de-la-Madeleine (secteur)?
Seasonal air quality in Cap-de-la-Madeleine (secteur) is closely linked to its riverside industry along the St. Lawrence. 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 Cap-de-la-Madeleine (secteur) 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