St. Catharines, Ontario, Canada Air Quality

Monitoring Station · St. Catharines, Canada
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast
25 1pm
25
25
25 4pm
27
27
34 7pm
34
34
34 10pm
27
27
27 1am
27
27
— 4am
—
—
— 7am
—
—
— 10am
—
—

Air Quality Forecast (24h)

PM2.56.0 µg/m³ ✓ WHO
Good
View city history →

Nearby Monitoring Stations

42
St. Catharines, Ontario, Canada
0.0 km PM2.5: 10.1 µg/m³
25
St. Catharines, Ontario, Canada
0.0 km PM2.5: 6.0 µg/m³
46
St. Catharines, Ontario, Canada
0.0 km PM2.5: 11.0 µg/m³

Nearby Cities

33 St. Catharines 33 Thorold 33 Niagara Falls 33 Niagara-on-the-Lake 33 Niagara Falls 33 Welland 27 Grand Island 30 Grimsby 32 Port Colborne

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-08-10T16:05 UTC.