St. Catharines air quality
Updated 03/10, 20:01
The data may not be up to date.
Current AQI
US EPA scale · observed at 20:00
33
GoodAir quality is good; enjoy outdoor activities.
Pollutants
Current concentrations, µg/m³
| Pollutant | Concentration | Description |
|---|---|---|
| PM2.5 | 2 µg/m³ | Fine particles ≤ 2.5 µm |
| PM10 | 2 µg/m³ | Particles ≤ 10 µm |
| O₃ | 60 µg/m³ | Ozone |
| NO₂ | 7,2 µg/m³ | Nitrogen dioxide |
| SO₂ | 0,7 µg/m³ | Sulphur dioxide |
| CO | 145 µg/m³ | Carbon monoxide |