St. Catharines, Ontario, Canada

Monitoring Station · St. Catharines, Canada
24
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast
25 8am
22
24
37 11am
37
37
37 2pm
37
37
50 5pm
75
75
75 8pm
75
—
— 11pm
—
—
— 2am
—
—
— 5am
—
—

Air Quality Trend (24h)

Nearby Monitoring Stations

23
St. Catharines, Ontario, Canada
0.0 km
34
St. Catharines, Ontario, Canada
0.0 km

Nearby Cities

23 St. Catharines 23 Thorold 23 Niagara Falls 23 Niagara-on-the-Lake 23 Niagara Falls 24 Welland 23 Grand Island 12 Grimsby 24 Port Colborne

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-04-10T11:09 UTC.