St. Catharines, Ontario, Canada

Monitoring Station · St. Catharines, Canada
22
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
26 2pm
53
25
25 5pm
18
25
25 8pm
25
45
25 11pm
25
18
25 2am
25
25
— 5am
—
—
— 8am
—
—
— 11am
—
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Station readings
26
53
22
CAMS model adj -9
34
34
34
34
27
34
34
34
54
34
34
27
34
34
34

Air Quality Trend (24h)

PM2.55.3 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

Nearby Cities

25 St. Catharines 25 Thorold 21 Niagara Falls 25 Niagara-on-the-Lake 20 Niagara Falls 25 Welland 14 Grand Island 60 Grimsby 31 Port Colborne

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-04-15T17:34 UTC.