Cornwall, Ontario, Canada

Monitoring Station · Cornwall, Canada
20
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
20 2pm
67
67
67 5pm
69
69
69 8pm
69
69
67 11pm
66
66
66 2am
66
66
— 5am
—
—
— 8am
—
—
— 11am
—
—
Station readings
20
CAMS model adj +42
25
25
25
25
27
27
27
27
27
25
24
24
24
24
24

Air Quality Trend (24h)

PM2.54.8 µg/m³ ✓ WHO
Good
View city history →

Nearby Monitoring Stations

34
Cornwall, Ontario, Canada
0.0 km PM2.5: 8.2 µg/m³
22
Cornwall, Ontario, Canada
0.0 km PM2.5: 5.3 µg/m³
22
Cornwall, Ontario, Canada
0.0 km PM2.5: 5.3 µg/m³
19
Cornwall, Ontario, Canada
0.0 km PM2.5: 4.6 µg/m³

Nearby Cities

22 Cornwall 10 Les Coteaux 11 Salaberry-de-Valleyfield 5 Saint-Lazare 5 Vaudreuil-Dorion 8 Clarence-Rockland 22 Orléans 21 Fallingbrook 25 Gloucester

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-04-14T17:33 UTC.