St. Catharines, Ontario, Canada Air Quality

Monitoring Station · St. Catharines, Canada
43
Good
Air quality is satisfactory. Enjoy outdoor activities.
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Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
67 5pm
87
87
87 8pm
87
87
67 11pm
67
58
58 2am
58
58
60 5am
60
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CAMS model adj +33
34
54
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54
54
54
34
34
25
25
25
25
27
27

Air Quality Forecast (24h)

PM2.510.3 µg/m³ ✓ WHO
Good
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Nearby Monitoring Stations

61
St. Catharines, Ontario, Canada
0.0 km PM2.5: 16.9 µg/m³

Nearby Cities

35 St. Catharines 35 Thorold 35 Niagara Falls 35 Niagara-on-the-Lake 35 Niagara Falls 35 Welland 96 Grand Island 35 Grimsby 64 Port Colborne

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-07-21T20:11 UTC.