AQHI now · Walden
All cities →2.8
Low health risk
Observed Thu 4:00 PM · Calgary
- Today
- 3 Low risk
- Tonight
- 3 Low risk
- Tomorrow
- 3 Low risk
- Tomorrow night
- 4 Moderate 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
PM2.54.1 µg/m³WHO guideline 15
PM104.5 µg/m³WHO guideline 45
NO₂11 µg/m³WHO guideline 25
O₃88 µg/m³WHO guideline 100
Model estimates from WeatherAPI.com; WHO 24-hour guidelines (8-hour for ozone).
Pollen today · Walden
TreesNonenone in the air
GrassHigh57 grains/m³
WeedsModerate47 grains/m³ · Mugwort
Fri: grass high · Sat: grass high · Sun: grass high
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 |
|---|---|---|
| 5 PM | 4.1 | 4.5 |
| 6 PM | 5.2 | 5.6 |
| 7 PM | 8.1 | 8.4 |
| 8 PM | 13.8 | 14.1 |
| 9 PM | 17.1 | 17.5 |
| 10 PM | 19.4 | 19.8 |
| 11 PM | 21.5 | 21.9 |
| 12 AM | 23.2 | 23.6 |
| 1 AM | 24.7 | 25.1 |
| 2 AM | 25.1 | 25.5 |
| 3 AM | 24.1 | 24.4 |
| 4 AM | 22.1 | 22.4 |