Worst air pollution North York, today and tomorrow
Today (20 September): Air quality in North York is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 PM (NO2: 20.0/100).
Tomorrow (21 September 2026): Air quality in North York is fair. AQI worsens to fair; NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 4:00 PM (NO2: 27.0/100). 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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In North York, with light traffic, dust from nearby farmland matters more than exhaust. Nearby trees help filter some of this load before it settles. Nearby areas with a similar setup show a comparable baseline. Readings shift with wind direction, traffic, and weather.
Today - 20 September | Pollution peaks at 16:00
AQI:
Good
20.0/100
PM2.5 (fine particles):
Good
13.3/100
PM10 (coarse particles):
Good
9.3/100
NO2 (nitrogen dioxide):
Good
20.0/100
O3 (ozone):
Good
18.0/100
SO2 (sulfur dioxide):
Good
0.4/100
CO (carbon monoxide):
Good
0.7/100
HCHO (formaldehyde):
Good
5.1/100
PM1 (ultrafine particles):
Good
3.6/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 16:00
AQI:
Fair
27.0/100
PM2.5 (fine particles):
Good
15.8/100
PM10 (coarse particles):
Good
11.5/100
NO2 (nitrogen dioxide):
Fair
27.0/100
O3 (ozone):
Good
16.3/100
SO2 (sulfur dioxide):
Good
0.6/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
5.6/100
PM1 (ultrafine particles):
Good
3.7/100
Pollen forecast in North York
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Frequently Asked Questions
Is air quality bad in North York right now?
On 20 September 2026, overall air quality in North York is good. AQI is the main air quality indicator at 20.0/100. Pollution peaks around 4:00 PM (NO2: 20.0/100).
Will air quality be worse tomorrow in North York?
On 21 September 2026, air quality conditions in North York will be worse than today, with AQI forecast at fair at 27.0/100. Pollution peaks around 4:00 PM (NO2: 27.0/100).
When is air pollution at its worst in North York?
Winter is when particulate matter climbs highest, as cold, still air traps heating smoke.. By summer, ozone becomes the bigger issue, as sun and heat drive its formation.. Milder spring and fall weather tends to give the clearest air.
Are air quality levels in North York 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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