St. Catharines, Ontario, Canada Air Quality

Monitoring Station · St. Catharines, Canada
35
Good
Air quality is satisfactory. Enjoy outdoor activities.
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Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
52 10pm
52
52
52 1am
52
52
32 4am
32
25
25 7am
25
23
23 10am
23
23
— 1pm
—
—
— 4pm
—
—
— 7pm
—
—
CAMS model adj -2
54
54
54
54
54
54
34
34
27
27
27
25
25
25
25

Air Quality Forecast (24h)

PM2.58.4 µg/m³ ✓ WHO
Good
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Nearby Monitoring Stations

38
St. Catharines, Ontario, Canada
0.0 km PM2.5: 9.1 µg/m³
36
St. Catharines, Ontario, Canada
0.0 km PM2.5: 8.6 µg/m³
36
St. Catharines, Ontario, Canada
0.0 km PM2.5: 8.6 µg/m³
30
St. Catharines, Ontario, Canada
0.0 km PM2.5: 7.2 µg/m³
42
St. Catharines, Ontario, Canada
0.0 km PM2.5: 10.1 µg/m³
39
St. Catharines, Ontario, Canada
0.0 km PM2.5: 9.4 µg/m³
34
St. Catharines, Ontario, Canada
0.0 km PM2.5: 8.2 µg/m³

Nearby Cities

35 St. Catharines 35 Thorold 35 Niagara Falls 35 Niagara-on-the-Lake 35 Niagara Falls 35 Welland 54 Grand Island 38 Grimsby 31 Port Colborne

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-08-08T01:31 UTC.