AQHI now · Ajax
All cities →1.8
Low health risk
Observed Thu 7:00 PM · Oshawa
- Tonight
- 2 Low risk
- Tomorrow
- 2 Low risk
- Tomorrow night
- 3 Low risk
Environment and Climate Change Canada · forecast issued Thu 5:00 PM
Health advice now
- People at risk
- Enjoy your usual outdoor activities.
- Everyone else
- Ideal air quality for outdoor activities.
Pollutants now
PM2.57.7 µg/m³WHO guideline 15
PM107.8 µg/m³WHO guideline 45
NO₂24 µg/m³WHO guideline 25
O₃34 µg/m³WHO guideline 100
Model estimates from WeatherAPI.com; WHO 24-hour guidelines (8-hour for ozone).
Pollen today · Ajax
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 |
|---|---|---|
| 8 PM | 7.7 | 7.8 |
| 9 PM | 9 | 9.1 |
| 10 PM | 10 | 10.1 |
| 11 PM | 10.2 | 10.3 |
| 12 AM | 10 | 10.1 |
| 1 AM | 9.7 | 9.8 |
| 2 AM | 9.6 | 9.7 |
| 3 AM | 9.4 | 9.5 |
| 4 AM | 9.1 | 9.2 |
| 5 AM | 8.9 | 9 |
| 6 AM | 9 | 9.1 |
| 7 AM | 9.8 | 9.9 |