St. Catharines, Ontario, Canada Air Quality

Monitoring Station · St. Catharines, Canada
30
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
14 5am
24
24
30 8am
22
22
22 11am
22
21
21 2pm
22
22
24 5pm
22
22
— 8pm
—
—
— 11pm
—
—
— 2am
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Station readings
14
30
CAMS model adj -3
34
27
27
27
25
25
25
25
24
24
25
25
27
25
25

Air Quality Forecast (24h)

PM2.57.2 µg/m³ ✓ WHO
Good
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Nearby Monitoring Stations

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
39
St. Catharines, Ontario, Canada
0.0 km PM2.5: 9.4 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 2026-08-08T08:21 UTC.