AQHI now · College Heights
All cities →1.5
Low health risk
Observed Sat 12:00 AM · Thunder Bay
- Friday night
- 2 Low risk
- Today
- 2 Low risk
- Tonight
- 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
PM2.51.2 µg/m³WHO guideline 15
PM101.4 µg/m³WHO guideline 45
NO₂2 µg/m³WHO guideline 25
O₃64 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 |
|---|---|---|
| 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 |
| 8 AM | 1.7 | 1.9 |
| 9 AM | 2 | 2.2 |
| 10 AM | 2.3 | 2.5 |
| 11 AM | 2.8 | 3 |
| 12 PM | 3.2 | 3.5 |