St. Catharines, Ontario, Canada Air Quality

Monitoring Station · St. Catharines, Canada
34
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
30 1pm
23
23
34 4pm
23
30
50 7pm
50
50
50 10pm
50
30
50 1am
50
50
— 4am
—
—
— 7am
—
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— 10am
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Station readings
34
CAMS model adj -4
34
27
27
27
27
34
54
54
54
54
54
34
54
54
54

Air Quality Forecast (24h)

PM2.58.2 µg/m³ ✓ WHO
Good
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Nearby Monitoring Stations

1
St. Catharines, Ontario, Canada
0.0 km PM2.5: 0.2 µg/m³
2
St. Catharines, Ontario, Canada
0.0 km PM2.5: 0.5 µg/m³
1
St. Catharines, Ontario, Canada
0.0 km PM2.5: 0.2 µg/m³
34
St. Catharines, Ontario, Canada
0.0 km PM2.5: 8.2 µg/m³
30
St. Catharines, Ontario, Canada
0.0 km PM2.5: 7.2 µg/m³
34
St. Catharines, Ontario, Canada
0.0 km PM2.5: 8.2 µg/m³

Nearby Cities

30 St. Catharines 30 Thorold 32 Niagara Falls 30 Niagara-on-the-Lake 32 Niagara Falls 30 Welland 37 Grand Island 15 Grimsby 35 Port Colborne

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-08-12T16:36 UTC.