Get a monitor and contributor to air quality data in your city.
Air Quality 
Air Monitors
Air Purifiers
For Business
News
Support
Air quality in St. Catharines
Air quality index (AQI) and PM2.5 air pollution in St. Catharines
2.4K people follow this city
St. Catharines Air Quality Map
Real-time St. Catharines air pollution map
AIR QUALITY DATA CONTRIBUTORS
Government of Ontario, Ministry of the Environment
See all
Pollen
What is the pollen count in St. Catharines today?
 | Index | Low | |
 | Tree pollen | Low | |
 | Grass pollen | None | |
 | Weed pollen | None |
Source: tomorrow.io
Weather
What is the current weather in St. Catharines?
| Weather | Clear sky |
| Temperature | 46.4°F |
| Humidity | 44% |
| Wind | 7.8 mp/h |
| Pressure | 30.4 Hg |
live aqi city ranking
Real-time Canada city ranking
| # | city | US AQI |
|---|---|---|
| 1 | Cold Lake, Alberta | 44 |
| 2 | Patricia Mcinnes, Alberta | 40 |
| 3 | Gibbons, Alberta | 38 |
| 4 | Quesnel, British Columbia | 38 |
| 5 | Fort Mckay, Alberta | 37 |
| 6 | Lac La Biche, Alberta | 37 |
| 7 | Sherwood Park, Alberta | 37 |
| 8 | London, Ontario | 36 |
| 9 | Whitehorse, Yukon | 34 |
| 10 | Kitchener, Ontario | 33 |
(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 | 29 |
(local time)
SEE WORLD AQI RANKING
US AQI
29
live AQI index
Good
Overview
What is the current air quality in St. Catharines?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Good | 29 US AQI | O3 |
| Pollutants | Concentration | |
|---|---|---|
| O3 | 72µg/m³ | |
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 |
|---|---|---|---|---|
| Monday, Apr 22 | Good 40 AQI US |  | 57.2° 42.8° |  24.6 mp/h |
| Tuesday, Apr 23 | Good 31 AQI US | | 46.4° 37.4° | 15.7 mp/h |
| Wednesday, Apr 24 | Good 22 AQI US | | 46.4° 33.8° | 11.2 mp/h |
| Today | Good 29 AQI US | | 46.4° 33.8° | 11.2 mp/h |
| Friday, Apr 26 | Good 14 AQI US | | 51.8° 33.8° | 13.4 mp/h |
| Saturday, Apr 27 | Good 24 AQI US | 100% | 51.8° 46.4° | 15.7 mp/h |
| Sunday, Apr 28 | Good 50 AQI US | 100% | 60.8° 51.8° | 15.7 mp/h |
| Monday, Apr 29 | Moderate 57 AQI US  | 70% | 59° 51.8° | 8.9 mp/h |
| Tuesday, Apr 30 | Moderate 63 AQI US | 50% | 60.8° 53.6° | 11.2 mp/h |
| Wednesday, May 1 | Moderate 58 AQI US | 90% | 60.8° 50° | 17.9 mp/h |
| Thursday, May 2 | Good 12 AQI US | | 55.4° 46.4° | 13.4 mp/h |
Interested in hourly forecast? Get the app
News
The latest air quality news and resources.
St. Catharines air quality data attribution
1Contributor
Government Contributor
2 Data sources
Where is the cleanest air quality in St. Catharines?
AQI US, Metric