St. Catharines, Ontario, Canada Air Quality

Monitoring Station · St. Catharines, Canada
42
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
37 1pm
42
37
37 4pm
39
39
46 7pm
46
46
46 10pm
39
39
39 1am
39
39
— 4am
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—
— 7am
—
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— 10am
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Station readings
42
CAMS model adj +12
25
25
25
25
27
27
34
34
34
34
27
27
27
27
27

Air Quality Forecast (24h)

PM2.510.1 µg/m³ ✓ WHO
Good
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Nearby Monitoring Stations

25
St. Catharines, Ontario, Canada
0.0 km PM2.5: 6.0 µg/m³
25
St. Catharines, Ontario, Canada
0.0 km PM2.5: 6.0 µg/m³
46
St. Catharines, Ontario, Canada
0.0 km PM2.5: 11.0 µg/m³

Nearby Cities

33 St. Catharines 33 Thorold 33 Niagara Falls 33 Niagara-on-the-Lake 33 Niagara Falls 33 Welland 27 Grand Island 30 Grimsby 32 Port Colborne

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-08-10T16:06 UTC.