St. Catharines, Ontario, Canada Air Quality

Monitoring Station · St. Catharines, Canada
36
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
68 10pm
36
68
68 1am
68
68
48 4am
48
41
41 7am
41
39
39 10am
39
39
— 1pm
—
—
— 4pm
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—
— 7pm
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Station readings
36
CAMS model adj +14
54
54
54
54
54
54
34
34
27
27
27
25
25
25
25

Air Quality Forecast (24h)

PM2.58.6 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
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
35
St. Catharines, Ontario, Canada
0.0 km PM2.5: 8.4 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 2026-08-08T01:30 UTC.