St. Catharines, Ontario, Canada

Monitoring Station · St. Catharines, Canada
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
40 12am
40
40
25 3am
40
20
20 6am
20
20
20 9am
20
20
13 12pm
13
13
— 3pm
—
—
— 6pm
—
—
— 9pm
—
—
Station readings
25
CAMS model adj -14
54
54
54
54
54
34
34
34
34
34
34
34
27
27
27

Air Quality Trend (24h)

PM2.56.0 µg/m³ ✓ WHO
Good
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Nearby Cities

25 St. Catharines 25 Thorold 23 Niagara Falls 25 Niagara-on-the-Lake 23 Niagara Falls 25 Welland 21 Grand Island 38 Grimsby 45 Port Colborne

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-04-13T03:54 UTC.