AQHI now · Ajax
All cities →1.7
Low health risk
Observed Fri 1:00 AM · Oshawa
- Thursday night
- 2 Low risk
- Today
- 2 Low risk
- Tonight
- 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
PM2.55 µg/m³WHO guideline 15
PM105 µg/m³WHO guideline 45
NO₂19 µg/m³WHO guideline 25
O₃30 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
Sat: weeds low · Sun: weeds low · Mon: 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 |
|---|---|---|
| 2 AM | 5 | 5 |
| 3 AM | 5.9 | 5.9 |
| 4 AM | 6 | 6 |
| 5 AM | 6.1 | 6.1 |
| 6 AM | 5.9 | 5.9 |
| 7 AM | 6 | 6 |
| 8 AM | 5.6 | 5.6 |
| 9 AM | 4 | 4 |
| 10 AM | 2.5 | 2.6 |
| 11 AM | 1.9 | 2 |
| 12 PM | 1.6 | 1.7 |
| 1 PM | 1.4 | 1.5 |