Worst air pollution Rimouski, today and tomorrow
Today (16 July): Air quality in Rimouski is medium. AQI, NO2, and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 8:00 AM (O3: 50.9/100).
Tomorrow (17 July 2026): Air quality in Rimouski is fair. O3 increases to fair; all other pollutants stay as today. Pollution peaks around 11:00 PM (NO2: 41.0/100). 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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Rimouski's air quality benefits from its St. Lawrence estuary shoreline position, with river and gulf breezes providing reliable ventilation across this regional hub in the Bas-Saint-Laurent.
Today - 16 July | Pollution peaks at 08:00
AQI:
Medium
50.9/100
PM2.5 (fine particles):
Good
14.5/100
PM10 (coarse particles):
Good
4.7/100
NO2 (nitrogen dioxide):
Medium
43.1/100
O3 (ozone):
Medium
50.9/100
SO2 (sulfur dioxide):
Good
5.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.0/100
PM1 (ultrafine particles):
Good
17.6/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 23:00
AQI:
Medium
41.0/100
PM2.5 (fine particles):
Good
11.3/100
PM10 (coarse particles):
Good
3.7/100
NO2 (nitrogen dioxide):
Medium
41.0/100
O3 (ozone):
Fair
39.8/100
SO2 (sulfur dioxide):
Good
5.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.3/100
PM1 (ultrafine particles):
Good
13.0/100
Pollen forecast in Rimouski
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Rimouski
Frequently Asked Questions
Is air quality bad in Rimouski right now?
On 16 July 2026, overall air quality in Rimouski is medium. AQI is the main air quality indicator at 50.9/100. Pollution peaks around 8:00 AM (O3: 50.9/100).
Will air quality be worse tomorrow in Rimouski?
On 17 July 2026, air quality conditions in Rimouski will be worse than today, with O3 forecast at fair at 39.8/100. Pollution peaks around 11:00 PM (NO2: 41.0/100).
When is air pollution at its worst in Rimouski?
Seasonal air quality in Rimouski is closely linked to its position along the widening St. Lawrence estuary. Spring planting and fall harvest can raise dust levels briefly, while summer heat occasionally pushes up ground-level ozone; winter usually brings the cleanest, calmest air of the year. Away from the main roads, air quality generally stays good even during the busier farming months.
Are air quality levels in Rimouski 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