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Air quality in St. Catharines
Air quality index (AQI) and PM2.5 air pollution in St. Catharines
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St. Catharines Air Quality Map
Real-time St. Catharines air pollution map
Pollen
What is the pollen count in St. Catharines today?
 | Index | Very high | |
 | Tree pollen | Very high | |
 | Grass pollen | None | |
 | Weed pollen | None |
Source: tomorrow.io
Weather
What is the current weather in St. Catharines?
| Weather | Broken clouds |
| Temperature | 59°F |
| Humidity | 100% |
| Wind | 15.1 mp/h |
| Pressure | 30 Hg |
live aqi city ranking
Real-time Canada city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Kitchener, Ontario | 57 |
| 2 | Burlington, Ontario | 53 |
| 3 | Hamilton, Ontario | 52 |
| 4 | Mississauga, Ontario | 52 |
| 5 | Oakville, Ontario | 50 |
| 6 | Windsor, Ontario | 50 |
| 7 | Toronto, Ontario | 49 |
| 8 | London, Ontario | 48 |
| 9 | Rouyn-Noranda, Quebec | 46 |
| 10 | Waterloo, Ontario | 46 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
live St. Catharines aqi ranking
Real-time St. Catharines air quality ranking
| # | station | US AQI |
|---|---|---|
| 1 | St. Catharines Station | 31 |
(local time)
SEE WORLD AQI RANKING
US AQI
38*
live AQI index
Good
Overview
What is the current air quality in St. Catharines?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Good | 38* US AQI | PM2.5 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 9.1*µg/m³ | |
| O3 | 78*µg/m³ | |
| NO2 | 2.8*µg/m³ | |
!
PM2.5
x1.8
PM2.5 concentration in St. Catharines is currently 1.8 times the WHO annual air quality guideline value
Health Recommendations
What is the current air quality in St. Catharines?
 | Enjoy outdoor activities |
 | Open your windows to bring clean, fresh air indoors GET A MONITOR |
Forecast
St. Catharines air quality index (AQI) forecast
| Day | Pollution level | Weather | Temperature | Wind |
|---|---|---|---|---|
| Today | Good 38 AQI US |  90% | 59° 51.8° |  15.7 mp/h |
| Monday, Apr 29 | Good 40 AQI US | 100% | 55.4° 48.2° | 13.4 mp/h |
| Tuesday, Apr 30 | Good 46 AQI US | 90% | 53.6° 46.4° | 4.5 mp/h |
| Wednesday, May 1 | Good 49 AQI US | | 55.4° 46.4° | 4.5 mp/h |
| Thursday, May 2 | Moderate 61 AQI US  | | 59° 48.2° | 8.9 mp/h |
| Friday, May 3 | Moderate 64 AQI US | 100% | 60.8° 51.8° | 13.4 mp/h |
| Saturday, May 4 | Good 50 AQI US | 100% | 59° 50° | 22.4 mp/h |
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News
The latest air quality news and resources.
Where is the cleanest air quality in St. Catharines?
AQI US, Metric