Worst air pollution Salaberry-de-Valleyfield, today and tomorrow
Today (16 July): Air quality in Salaberry-de-Valleyfield 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: 36.4/100).
Tomorrow (17 July 2026): Air quality in Salaberry-de-Valleyfield is fair. All pollutants stay as today. Pollution peaks around 8:00 AM (O3: 29.7/100). 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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Salaberry-de-Valleyfield's air quality reflects its position on the St. Lawrence Seaway, with legacy textile and chemical industry and vehicle traffic on Highway 530 contributing local sources.
Today - 16 July | Pollution peaks at 07:00
AQI:
Fair
36.4/100
PM2.5 (fine particles):
Good
4.4/100
PM10 (coarse particles):
Good
1.8/100
NO2 (nitrogen dioxide):
Good
0.0/100
O3 (ozone):
Fair
36.4/100
SO2 (sulfur dioxide):
Good
0.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.5/100
PM1 (ultrafine particles):
Good
3.7/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 08:00
AQI:
Fair
29.7/100
PM2.5 (fine particles):
Good
5.4/100
PM10 (coarse particles):
Good
2.0/100
NO2 (nitrogen dioxide):
Good
0.0/100
O3 (ozone):
Fair
29.7/100
SO2 (sulfur dioxide):
Good
0.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.9/100
PM1 (ultrafine particles):
Good
4.6/100
Pollen forecast in Salaberry-de-Valleyfield
View pollen forecastFrequently Asked Questions
Is air quality bad in Salaberry-de-Valleyfield right now?
On 16 July 2026, overall air quality in Salaberry-de-Valleyfield is fair. AQI is the main air quality indicator at 36.4/100. Pollution peaks around 7:00 AM (O3: 36.4/100).
Will air quality be worse tomorrow in Salaberry-de-Valleyfield?
On 17 July 2026, air quality conditions in Salaberry-de-Valleyfield will be similar to today, with AQI forecast at fair at 29.7/100. Pollution peaks around 8:00 AM (O3: 29.7/100).
When is air pollution at its worst in Salaberry-de-Valleyfield?
Salaberry-de-Valleyfield's air quality follows a seasonal rhythm tied to its riverside textile and chemical industry on Lac Saint-Francois. 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 Salaberry-de-Valleyfield 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