AQHI now · Thunder Bay
All cities →1.9
Low health risk
Observed Fri 7:00 PM · Thunder Bay
- Tonight
- 2 Low risk
- Tomorrow
- 2 Low risk
- Tomorrow night
- 2 Low risk
Environment and Climate Change Canada · forecast issued Fri 5:00 PM
Health advice now
- People at risk
- Enjoy your usual outdoor activities.
- Everyone else
- Ideal air quality for outdoor activities.
Pollutants now
PM2.52.1 µg/m³WHO guideline 15
PM102.3 µg/m³WHO guideline 45
NO₂7 µg/m³WHO guideline 25
O₃58 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 |
|---|---|---|
| 8 PM | 2.1 | 2.3 |
| 9 PM | 1.9 | 2.1 |
| 10 PM | 1.7 | 1.9 |
| 11 PM | 1.6 | 1.8 |
| 12 AM | 1.4 | 1.6 |
| 1 AM | 1.2 | 1.4 |
| 2 AM | 1 | 1.2 |
| 3 AM | 1 | 1.2 |
| 4 AM | 1 | 1.3 |
| 5 AM | 1.1 | 1.3 |
| 6 AM | 1.2 | 1.5 |
| 7 AM | 1.4 | 1.6 |