Worst air pollution South End - Saint John, today and tomorrow
Today (9 August): Air quality in South End is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 AM (O3: 37.4/100).
Tomorrow (10 August 2026): Air quality in South End is fair. All pollutants stay as today. Pollution peaks around 12:00 PM (O3: 34.1/100). Airmine updates local air quality forecasts four times daily.
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South End's air quality benefits from its exposed Bay of Fundy coastal position with strong sea breezes, with local traffic modest.
Today - 9 August | Pollution peaks at 11:00
AQI:
Fair
37.4/100
PM2.5 (fine particles):
Good
5.9/100
PM10 (coarse particles):
Good
3.5/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Fair
37.4/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
8.9/100
PM1 (ultrafine particles):
Good
4.3/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 12:00
AQI:
Fair
34.1/100
PM2.5 (fine particles):
Good
6.8/100
PM10 (coarse particles):
Good
4.3/100
NO2 (nitrogen dioxide):
Good
0/100
O3 (ozone):
Fair
34.1/100
SO2 (sulfur dioxide):
Good
0/100
CO (carbon monoxide):
Good
0/100
HCHO (formaldehyde):
Good
7.5/100
PM1 (ultrafine particles):
Good
4.8/100
Other Landmarks in Saint John
Sports venues in Saint John
Frequently Asked Questions
Is air quality bad in South End right now?
On 9 August 2026, overall air quality in South End is fair. AQI is the main air quality indicator at 37.4/100. Pollution peaks around 11:00 AM (O3: 37.4/100).
Will air quality be worse tomorrow in South End?
On 10 August 2026, air quality conditions in South End will be similar to today, with AQI forecast at fair at 34.1/100. Pollution peaks around 12:00 PM (O3: 34.1/100).
When is air pollution at its worst in South End?
South End sees clear seasonal swings in air quality, driven in part by its historic peninsula streets in Saint John. 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 along the river has a strong influence on which neighbourhoods feel the effects most on any given day.
Are air quality levels in South End 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: 9 August 2026 at 20:27 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.
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