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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 | 60.8°F |
| Humidity | 82% |
| Wind | 3.3 mp/h |
| Pressure | 30.1 Hg |
live aqi city ranking
Real-time Canada city ranking
| # | city | US AQI |
|---|---|---|
| 1 |  London, Ontario | 67 |
| 2 | Edmundston, New Brunswick | 65 |
| 3 | Saint John, New Brunswick | 64 |
| 4 | Sherbrooke, Quebec | 64 |
| 5 | Saint-Bruno-de-Montarville, Quebec | 62 |
| 6 | Burlington, Ontario | 55 |
| 7 | Oakville, Ontario | 52 |
| 8 | Rouyn-Noranda, Quebec | 52 |
| 9 | Waterloo, Ontario | 52 |
| 10 | Laval, Quebec | 51 |
(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 | 44 |
(local time)
SEE WORLD AQI RANKING
US AQI
56
live AQI index
Moderate
Overview
What is the current air quality in St. Catharines?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Moderate | 56 US AQI | PM2.5 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 12µg/m³ | |
| O3 | 78µg/m³ | |
| NO2 | 20.3µg/m³ | |
!
PM2.5
x2.4
PM2.5 concentration in St. Catharines is currently 2.4 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 40 AQI US | | 73.4° 53.6° | 8.9 mp/h |
| Today | Moderate 56 AQI US | |||
| Sunday, Jun 2 | Moderate 57 AQI US |  100% | 60.8° 57.2° | 8.9 mp/h |
| Monday, Jun 3 | Moderate 62 AQI US | 40% | 66.2° 59° | 6.7 mp/h |
| Tuesday, Jun 4 | Moderate 63 AQI US | 60% | 71.6° 60.8° | 6.7 mp/h |
| Wednesday, Jun 5 | Moderate 60 AQI US | 100% | 71.6° 62.6° | 13.4 mp/h |
| Thursday, Jun 6 | Moderate 53 AQI US | 100% | 68° 59° | 13.4 mp/h |
| Friday, Jun 7 | Good 14 AQI US | 70% | 60.8° 55.4° | 17.9 mp/h |
| Saturday, Jun 8 | Good 12 AQI US | 100% | 66.2° 55.4° | 17.9 mp/h |
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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