AQHI now · St. Catharines
All cities →1.7
Low health risk
Observed Thu 3:00 PM · St. Catharines
- Today
- 1 Low risk
- Today
- 1 Low risk
- Today
- 1 Low risk
- Today
- 1 Low risk
Environment and Climate Change Canada · forecast issued Thu 6:00 AM
Health advice now
- People at risk
- Enjoy your usual outdoor activities.
- Everyone else
- Ideal air quality for outdoor activities.
Pollutants now
PM2.58.4 µg/m³WHO guideline 15
PM108.6 µg/m³WHO guideline 45
NO₂16 µg/m³WHO guideline 25
O₃78 µg/m³WHO guideline 100
Model estimates from WeatherAPI.com; WHO 24-hour guidelines (8-hour for ozone).
Particles · next 12 hours
µg/m³| Time | PM2.5 | PM10 |
|---|---|---|
| 4 PM | 8.4 | 8.6 |
| 5 PM | 8.9 | 9.1 |
| 6 PM | 9.4 | 9.6 |
| 7 PM | 11.6 | 11.7 |
| 8 PM | 13.7 | 13.9 |
| 9 PM | 14.9 | 15 |
| 10 PM | 14.5 | 14.6 |
| 11 PM | 13 | 13.1 |
| 12 AM | 10.2 | 10.3 |
| 1 AM | 6.6 | 6.7 |
| 2 AM | 4.3 | 4.4 |
| 3 AM | 3.3 | 3.4 |