St. Catharines, Ontario, Canada Air Quality

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

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
45 12am
15
45
34 3am
25
25
18 6am
18
18
16 9am
16
16
16 12pm
15
15
— 3pm
—
—
— 6pm
—
—
— 9pm
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—
Station readings
15
34
CAMS model adj -9
54
54
54
54
34
34
27
27
27
25
25
25
25
24
24

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
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 2026-08-08T03:30 UTC.