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
36 12am
54
54
54 3am
34
34
27 6am
27
27
25 9am
25
25
25 12pm
24
24
— 3pm
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—
— 6pm
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— 9pm
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Air Quality Forecast (24h)

PM2.58.6 µg/m³ ✓ WHO
Good
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Nearby Monitoring Stations

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
35
St. Catharines, Ontario, Canada
0.0 km PM2.5: 8.4 µg/m³
34
St. Catharines, Ontario, Canada
0.0 km PM2.5: 8.2 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 2026-08-08T03:24 UTC.