St. Catharines, Ontario, Canada

Monitoring Station · St. Catharines, Canada
53
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast
37 4am
53
37
25 7am
25
37
37 10am
37
37
37 1pm
37
37
37 4pm
50
—
— 7pm
—
—
— 10pm
—
—
— 1am
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Air Quality Trend (24h)

Nearby Monitoring Stations

50
St. Catharines, Ontario, Canada
0.0 km
34
St. Catharines, Ontario, Canada
0.0 km

Nearby Cities

12 St. Catharines 12 Thorold 12 Niagara Falls 12 Niagara-on-the-Lake 12 Niagara Falls 6 Welland 12 Grand Island 12 Grimsby 6 Port Colborne

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-04-10T07:12 UTC.