St. Catharines, Ontario, Canada Air Quality

Monitoring Station · St. Catharines, Canada
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
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Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
29 1pm
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29 4pm
31
31
38 7pm
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38 10pm
31
31
31 1am
31
31
— 4am
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CAMS model adj +4
25
25
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27
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34
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34
27
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27

Air Quality Forecast (24h)

PM2.56.0 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
42
St. Catharines, Ontario, Canada
0.0 km PM2.5: 10.1 µg/m³
46
St. Catharines, Ontario, Canada
0.0 km PM2.5: 11.0 µg/m³

Nearby Cities

33 St. Catharines 33 Thorold 33 Niagara Falls 33 Niagara-on-the-Lake 33 Niagara Falls 33 Welland 27 Grand Island 30 Grimsby 32 Port Colborne

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-08-10T16:05 UTC.