AQHI now · Merrickville
All cities →1.8
Low health risk
Observed Thu 11:00 PM · Ottawa
- Thursday night
- 2 Low risk
- Today
- 2 Low risk
- Tonight
- 2 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
PM2.513.9 µg/m³WHO guideline 15
PM1013.9 µg/m³WHO guideline 45
NO₂42 µg/m³WHO guideline 25
O₃16 µg/m³WHO guideline 100
Model estimates from WeatherAPI.com; WHO 24-hour guidelines (8-hour for ozone).
Pollen today · Merrickville
TreesNonenone in the air
GrassLow2 grains/m³
WeedsHigh79 grains/m³ · Ragweed
Fri: weeds high · Sat: weeds high · Sun: weeds 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 |
|---|---|---|
| 12 AM | 13.9 | 13.9 |
| 1 AM | 14.6 | 14.6 |
| 2 AM | 14.1 | 14.1 |
| 3 AM | 12.7 | 12.7 |
| 4 AM | 11.4 | 11.4 |
| 5 AM | 10.1 | 10.2 |
| 6 AM | 9 | 9.1 |
| 7 AM | 7.9 | 8 |
| 8 AM | 7.2 | 7.3 |
| 9 AM | 5.8 | 5.9 |
| 10 AM | 4.2 | 4.3 |
| 11 AM | 3.1 | 3.1 |