AQHI now · St. Catharines
All cities →1.7
Low health risk
Observed Fri 2:00 AM · 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
PM2.54.1 µg/m³WHO guideline 15
PM104.2 µg/m³WHO guideline 45
NO₂10 µg/m³WHO guideline 25
O₃48 µg/m³WHO guideline 100
Model estimates from WeatherAPI.com; WHO 24-hour guidelines (8-hour for ozone).
Pollen today · St. Catharines
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 |
|---|---|---|
| 3 AM | 4.1 | 4.2 |
| 4 AM | 4.5 | 4.5 |
| 5 AM | 4.4 | 4.4 |
| 6 AM | 5.1 | 5.1 |
| 7 AM | 5.5 | 5.5 |
| 8 AM | 5.1 | 5.1 |
| 9 AM | 4.3 | 4.3 |
| 10 AM | 3.6 | 3.6 |
| 11 AM | 3 | 3 |
| 12 PM | 2.6 | 2.7 |
| 1 PM | 2.4 | 2.4 |
| 2 PM | 2 | 2.1 |