St. Catharines, Ontario, Canada

Monitoring Station · St. Catharines, Canada
31
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
67 11am
34
31
34 2pm
34
14
14 5pm
7
7
7 8pm
14
14
14 11pm
34
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— 5am
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Station readings
67
31
CAMS model adj -20
54
54
54
54
54
34
34
27
27
27
34
34
34
54

Air Quality Trend (24h)

PM2.57.4 µg/m³ ✓ WHO
Good
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Nearby Monitoring Stations

34
St. Catharines, Ontario, Canada
0.0 km PM2.5: 8.2 µg/m³
25
St. Catharines, Ontario, Canada
0.0 km PM2.5: 6.0 µg/m³

Nearby Cities

33 St. Catharines 33 Thorold 26 Niagara Falls 33 Niagara-on-the-Lake 25 Niagara Falls 33 Welland 9 Grand Island 54 Grimsby 42 Port Colborne

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-04-18T14:08 UTC.