St. Catharines, Ontario, Canada

Monitoring Station · St. Catharines, Canada
28
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
38 8am
38
34
28 11am
38
77
77 2pm
77
65
65 5pm
65
65
65 8pm
65
65
— 11pm
—
—
— 2am
—
—
— 5am
—
—
Station readings
34
28
CAMS model adj +11
27
27
27
27
27
66
66
66
54
54
54
54
54
54
54

Air Quality Trend (24h)

PM2.56.7 µg/m³ ✓ WHO
Good
View city history →

Nearby Monitoring Stations

21
St. Catharines, Ontario, Canada
0.0 km PM2.5: 5.0 µg/m³

Nearby Cities

26 St. Catharines 26 Thorold 26 Niagara Falls 26 Niagara-on-the-Lake 26 Niagara Falls 26 Welland 13 Grand Island 47 Grimsby 39 Port Colborne

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-04-24T11:33 UTC.