Cornwall, Ontario, Canada Air Quality

Monitoring Station · Cornwall, Canada
51
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
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Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast
25 10pm
25
27
27 1am
34
34
34 4am
34
27
27 7am
27
27
27 10am
27
27
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Air Quality Forecast (24h)

PM2.512.1 µg/m³ ✓ WHO
Moderate
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Nearby Monitoring Stations

32
Cornwall, Ontario, Canada
0.0 km PM2.5: 7.7 µg/m³
38
Cornwall, Ontario, Canada
0.0 km PM2.5: 9.1 µg/m³
32
Cornwall, Ontario, Canada
0.0 km PM2.5: 7.7 µg/m³
33
Cornwall, Ontario, Canada
0.0 km PM2.5: 7.9 µg/m³
33
Cornwall, Ontario, Canada
0.0 km PM2.5: 7.9 µg/m³
34
Cornwall, Ontario, Canada
0.0 km PM2.5: 8.2 µg/m³
34
Cornwall, Ontario, Canada
0.0 km PM2.5: 8.2 µg/m³
34
Cornwall, Ontario, Canada
0.0 km PM2.5: 8.2 µg/m³

Nearby Cities

32 Cornwall 82 Les Coteaux 82 Salaberry-de-Valleyfield 82 Saint-Lazare 82 Vaudreuil-Dorion 40 Clarence-Rockland 49 Orléans 50 Fallingbrook 47 Gloucester

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-08-08T01:29 UTC.