AQHI now · Smithville
All cities →1.9
Low health risk
Observed Thu 9:00 PM · St. Catharines
- 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
PM2.53.9 µg/m³WHO guideline 15
PM103.9 µg/m³WHO guideline 45
NO₂12 µg/m³WHO guideline 25
O₃46 µg/m³WHO guideline 100
Model estimates from WeatherAPI.com; WHO 24-hour guidelines (8-hour for ozone).
Pollen today · Smithville
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 |
|---|---|---|
| 1 AM | 3.9 | 3.9 |
| 2 AM | 3.7 | 3.7 |
| 3 AM | 3.6 | 3.7 |
| 4 AM | 3.8 | 3.8 |
| 5 AM | 4.1 | 4.1 |
| 6 AM | 4.2 | 4.2 |
| 7 AM | 3.9 | 3.9 |
| 8 AM | 3.1 | 3.1 |
| 9 AM | 2.4 | 2.4 |
| 10 AM | 2.1 | 2.2 |
| 11 AM | 1.9 | 2 |
| 12 PM | 1.8 | 1.8 |