St. Catharines, Ontario, Canada Air Quality

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

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
33 11am
25
31
31 2pm
31
31
33 5pm
33
40
40 8pm
40
40
33 11pm
33
33
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— 5am
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Station readings
25
CAMS model adj +6
27
27
25
25
25
25
27
27
34
34
34
34
27
27
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

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 2026-08-10T14:52 UTC.