AQHI now · Welland
All cities →1.2
Low health risk
Observed Sat 3:00 AM · St. Catharines
- Friday night
- 2 Low risk
- Today
- 2 Low risk
- Tonight
- 2 Low risk
Environment and Climate Change Canada · forecast issued Fri 5:00 PM
Health advice now
- People at risk
- Enjoy your usual outdoor activities.
- Everyone else
- Ideal air quality for outdoor activities.
Pollutants now
PM2.52.2 µg/m³WHO guideline 15
PM102.2 µg/m³WHO guideline 45
NO₂6 µg/m³WHO guideline 25
O₃49 µg/m³WHO guideline 100
Model estimates from WeatherAPI.com; WHO 24-hour guidelines (8-hour for ozone).
Pollen today · Welland
TreesNonenone in the air
GrassNonenone in the air
WeedsLow<1 grains/m³ · Ragweed
Sun: weeds low · Mon: weeds low · Tue: 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 |
|---|---|---|
| 4 AM | 2.2 | 2.2 |
| 5 AM | 2.2 | 2.2 |
| 6 AM | 2.5 | 2.5 |
| 7 AM | 3.4 | 3.4 |
| 8 AM | 4.4 | 4.4 |
| 9 AM | 2.9 | 2.9 |
| 10 AM | 1.2 | 1.2 |
| 11 AM | 1.1 | 1.1 |
| 12 PM | 1.2 | 1.2 |
| 1 PM | 1.4 | 1.5 |
| 2 PM | 1.8 | 1.8 |
| 3 PM | 2.6 | 2.6 |