Worst air pollution St. Boniface - Winnipeg, today and tomorrow
Today (20 September): Air quality in St. Boniface is fair. AQI, PM2.5, PM10, and NO2 are fair; O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 PM (PM2.5: 39.9/100).
Tomorrow (21 September 2026): Air quality in St. Boniface is moderate. AQI worsens to moderate; PM2.5 increases to moderate; NO2 increases to moderate; all other pollutants stay as today. Pollution peaks around 1:00 PM (NO2: 47.9/100). 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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St. Boniface's air quality benefits from its Red River riverside position, with Provencher Boulevard traffic the modest primary local source.
Today - 20 September | Pollution peaks at 12:00
AQI:
Fair
39.9/100
PM2.5 (fine particles):
Fair
39.9/100
PM10 (coarse particles):
Fair
29.8/100
NO2 (nitrogen dioxide):
Fair
22.1/100
O3 (ozone):
Good
13.6/100
SO2 (sulfur dioxide):
Good
1.0/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
1.7/100
PM1 (ultrafine particles):
Good
7.9/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 13:00
AQI:
Moderate
47.9/100
PM2.5 (fine particles):
Moderate
42.1/100
PM10 (coarse particles):
Fair
34.1/100
NO2 (nitrogen dioxide):
Moderate
47.9/100
O3 (ozone):
Good
15.0/100
SO2 (sulfur dioxide):
Good
2.1/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
1.4/100
PM1 (ultrafine particles):
Good
14.5/100
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Frequently Asked Questions
Is air quality bad in St. Boniface right now?
On 20 September 2026, overall air quality in St. Boniface is fair. AQI is the main air quality indicator at 39.9/100. Pollution peaks around 12:00 PM (PM2.5: 39.9/100).
Will air quality be worse tomorrow in St. Boniface?
On 21 September 2026, air quality conditions in St. Boniface will be worse than today, with AQI forecast at moderate at 47.9/100. Pollution peaks around 1:00 PM (NO2: 47.9/100).
When is air pollution at its worst in St. Boniface?
St. Boniface sees clear seasonal swings in air quality, driven in part by its riverside streets on the east side of the Red River. Warm, sticky summer days can occasionally trap local pollution, while frigid winter nights bring a modest bump from wood and heating smoke. A blustery prairie wind system typically sweeps any buildup away within a day or so.
Are air quality levels in St. Boniface 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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 20 September 2026 at 14:33 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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