St. Catharines, Ontario, Canada Air Quality

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

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
34 2am
33
13
13 5am
6
6
6 8am
4
4
4 11am
4
3
3 2pm
4
4
— 5pm
—
—
— 8pm
—
—
— 11pm
—
—
CAMS model adj -21
54
54
34
34
27
27
27
25
25
25
25
24
24
25
25

Air Quality Forecast (24h)

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

36
St. Catharines, Ontario, Canada
0.0 km PM2.5: 8.6 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
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
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 2026-08-08T05:43 UTC.