Cornwall, Ontario, Canada Air Quality

Monitoring Station · Cornwall, Canada
177
Unhealthy
Everyone should reduce prolonged outdoor exertion.
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Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast
24 10pm
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25 1am
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25 4am
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27 7am
27
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27 10am
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25
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Air Quality Forecast (24h)

PM2.5105.9 µg/m³ ×7.1 WHO
Unhealthy
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Nearby Monitoring Stations

14
Cornwall, Ontario, Canada
0.0 km PM2.5: 3.4 µg/m³
74
Cornwall, Ontario, Canada
0.0 km PM2.5: 23.0 µg/m³

Nearby Cities

29 Cornwall 21 Les Coteaux 22 Salaberry-de-Valleyfield 20 Saint-Lazare 32 Vaudreuil-Dorion 28 Clarence-Rockland 30 Orléans 30 Fallingbrook 33 Gloucester

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-06-09T01:50 UTC.