AQHI now · Forest
All cities →1.8
Low health risk
Observed Thu 3:00 PM · Sarnia
- Today
- 2 Low risk
- Tonight
- 2 Low risk
- Tomorrow
- 2 Low risk
- Tomorrow night
- 2 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
PM2.55.5 µg/m³WHO guideline 15
PM105.7 µg/m³WHO guideline 45
NO₂7 µg/m³WHO guideline 25
O₃56 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 | 5.5 | 5.7 |
| 5 PM | 5.9 | 6.1 |
| 6 PM | 5.7 | 5.9 |
| 7 PM | 5.7 | 5.8 |
| 8 PM | 5.8 | 5.9 |
| 9 PM | 5.6 | 5.7 |
| 10 PM | 5.3 | 5.4 |
| 11 PM | 5.1 | 5.2 |
| 12 AM | 4.8 | 4.8 |
| 1 AM | 4 | 4 |
| 2 AM | 3.1 | 3.1 |
| 3 AM | 2.3 | 2.3 |