AQHI now · Woburn
All cities →1.8
Low health risk
Observed Thu 3:00 AM · Toronto East
- Wednesday night
- 3 Low risk
- Today
- 2 Low risk
- Tonight
- 2 Low risk
Environment and Climate Change Canada · forecast issued Wed 5:00 PM
Health advice now
- People at risk
- Enjoy your usual outdoor activities.
- Everyone else
- Ideal air quality for outdoor activities.
Pollutants now
PM2.51.7 µg/m³WHO guideline 15
PM101.8 µg/m³WHO guideline 45
NO₂9 µg/m³WHO guideline 25
O₃64 µg/m³WHO guideline 100
Model estimates from WeatherAPI.com; WHO 24-hour guidelines (8-hour for ozone).
Pollen today · Woburn
TreesNonenone in the air
GrassNonenone in the air
WeedsLow<1 grains/m³ · Ragweed
Fri: weeds low · Sat: weeds low · Sun: weeds low
Model estimate from WeatherAPI.com — pollen grains per m³ of air; levels on the National Allergy Bureau scale.
Model estimate from WeatherAPI.com — pollen grains per m³ of air; levels on the National Allergy Bureau scale.
Particles · next 12 hours
µg/m³| Time | PM2.5 | PM10 |
|---|---|---|
| 4 AM | 1.7 | 1.8 |
| 5 AM | 1.6 | 1.7 |
| 6 AM | 2 | 2.1 |
| 7 AM | 3.7 | 3.8 |
| 8 AM | 5.5 | 5.6 |
| 9 AM | 6 | 6 |
| 10 AM | 6 | 6 |
| 11 AM | 5.8 | 5.8 |
| 12 PM | 6.1 | 6.1 |
| 1 PM | 5.6 | 5.6 |
| 2 PM | 5.7 | 5.7 |
| 3 PM | 5.9 | 6 |