AQHI now · Walden
All cities →3.7
Moderate health risk
Observed Mon 10:00 PM · Calgary
- Tonight
- 4 Moderate risk
- Tomorrow
- 4 Moderate risk
- Tomorrow night
- 3 Low risk
Environment and Climate Change Canada · forecast issued Mon 5:00 PM
Health advice now
- People at risk
- Consider reducing or rescheduling strenuous activities outdoors if you are experiencing symptoms.
- Everyone else
- No need to modify your usual outdoor activities unless you experience symptoms such as coughing and throat irritation.
Pollutants now
PM2.518 µg/m³WHO guideline 15
PM1020.4 µg/m³WHO guideline 45
NO₂72 µg/m³WHO guideline 25
O₃11 µg/m³WHO guideline 100
Model estimates from WeatherAPI.com; WHO 24-hour guidelines (8-hour for ozone).
Pollen today · Walden
TreesNonenone in the air
GrassLow<1 grains/m³
WeedsModerate14 grains/m³ · Ragweed
Tue: weeds moderate · Wed: weeds moderate · Thu: weeds moderate
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 |
|---|---|---|
| 11 PM | 18 | 20.4 |
| 12 AM | 16.2 | 18.2 |
| 1 AM | 14.4 | 16.2 |
| 2 AM | 13.2 | 14.8 |
| 3 AM | 12.2 | 13.6 |
| 4 AM | 10.8 | 12.1 |
| 5 AM | 9.5 | 10.7 |
| 6 AM | 8.2 | 9.3 |
| 7 AM | 8.3 | 9.3 |
| 8 AM | 9.2 | 10.2 |
| 9 AM | 9.3 | 10.3 |
| 10 AM | 9.1 | 10.1 |