St. Catharines, Ontario, Canada Air Quality

Monitoring Station · St. Catharines, Canada
8
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
12 9pm
8
10
12 12am
19
39
19 3am
12
10
10 6am
10
10
10 9am
10
10
— 12pm
—
—
— 3pm
—
—
— 6pm
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Station readings
8
CAMS model adj -15
27
27
25
27
34
54
34
27
25
25
25
25
25
25
25

Air Quality Trend (24h)

PM2.51.9 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

32 St. Catharines 32 Thorold 32 Niagara Falls 32 Niagara-on-the-Lake 32 Niagara Falls 32 Welland 25 Grand Island 31 Grimsby 22 Port Colborne

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-05-29T00:12 UTC.