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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
AIR QUALITY DATA CONTRIBUTORS
Government of Ontario, Ministry of the Environment
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Pollen
What is the pollen count in St. Catharines today?
 | Index | None | |
 | Tree pollen | None | |
 | Grass pollen | None | |
 | Weed pollen | None |
Source: tomorrow.io
Weather
What is the current weather in St. Catharines?
| Weather | Broken clouds |
| Temperature | 64.4°F |
| Humidity | 89% |
| Wind | 3.4 mp/h |
| Pressure | 30 Hg |
live aqi city ranking
Real-time Canada city ranking
| # | city | US AQI |
|---|---|---|
| 1 |  Brampton, Ontario | 75 |
| 2 | Hamilton, Ontario | 63 |
| 3 | Mississauga, Ontario | 63 |
| 4 | Toronto, Ontario | 60 |
| 5 | Oakville, Ontario | 59 |
| 6 | Kitchener, Ontario | 55 |
| 7 | Oshawa, Ontario | 55 |
| 8 | West End, British Columbia | 55 |
| 9 | Burlington, Ontario | 53 |
| 10 | St. Albert, Alberta | 53 |
(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 | 53 |
(local time)
SEE WORLD AQI RANKING
US AQI
53
live AQI index
Moderate
Overview
What is the current air quality in St. Catharines?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Moderate | 53 US AQI | PM2.5 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 10µg/m³ | |
| O3 | 68µg/m³ | |
!
PM2.5
x2
PM2.5 concentration in St. Catharines is currently 2 times the WHO annual air quality guideline value
Health Recommendations
What is the current air quality in St. Catharines?
 | Sensitive groups should reduce outdoor exercise |
 | Close your windows to avoid dirty outdoor air GET A MONITOR |
 | Sensitive groups should wear a mask outdoors GET A MASK |
 | Sensitive groups should run an air purifier GET AN AIR PURIFIER |
Forecast
St. Catharines air quality index (AQI) forecast
| Day | Pollution level | Weather | Temperature | Wind |
|---|---|---|---|---|
| Thursday, May 30 | Good 29 AQI US  |  | 69.8° 50° |  8.9 mp/h |
| Friday, May 31 | Good 39 AQI US | | 73.4° 53.6° | 8.9 mp/h |
| Saturday, Jun 1 | Moderate 52 AQI US |  | 64.4° 60.8° | 6.7 mp/h |
| Today | Moderate 53 AQI US | 70% | 64.4° 60.8° | 6.7 mp/h |
| Monday, Jun 3 | Moderate 62 AQI US | | 68° 60.8° | 6.7 mp/h |
| Tuesday, Jun 4 | Moderate 63 AQI US | | 71.6° 59° | 6.7 mp/h |
| Wednesday, Jun 5 | Moderate 60 AQI US | 100% | 71.6° 62.6° | 15.7 mp/h |
| Thursday, Jun 6 | Moderate 53 AQI US | 100% | 64.4° 59° | 13.4 mp/h |
| Friday, Jun 7 | Good 14 AQI US | 100% | 59° 53.6° | 13.4 mp/h |
| Saturday, Jun 8 | Good 12 AQI US | 50% | 62.6° 51.8° | 6.7 mp/h |
Interested in hourly forecast? Get the app
News
The latest air quality news and resources.
How to best protect from air pollution?
St. Catharines air quality data attribution
1Contributor
Government Contributor
2 Data sources
Where is the cleanest air quality in St. Catharines?
AQI US, Metric