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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 | Scattered clouds |
| Temperature | 59°F |
| Humidity | 72% |
| Wind | 6.9 mp/h |
| Pressure | 29.9 Hg |
live aqi city ranking
Real-time Canada city ranking
| # | city | US AQI |
|---|---|---|
| 1 |  Valemount, British Columbia | 53 |
| 2 | Levis, Quebec | 40 |
| 3 | West End, British Columbia | 37 |
| 4 | Chetwynd, British Columbia | 36 |
| 5 | Oakville, Ontario | 36 |
| 6 | Fort St John, British Columbia | 35 |
| 7 | Patricia Mcinnes, Alberta | 33 |
| 8 | Lac La Biche, Alberta | 31 |
| 9 | Mississauga, Ontario | 30 |
| 10 | Kamloops, British Columbia | 29 |
(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 | 17 |
(local time)
SEE WORLD AQI RANKING
US AQI
17
live AQI index
Good
Overview
What is the current air quality in St. Catharines?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Good | 17 US AQI | PM2.5 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 3.1µg/m³ | |
✓
PM2.5 concentration in St. Catharines air currently meets 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 |
|---|---|---|---|---|
| Monday, May 6 | Good 27 AQI US |  | 66.2° 46.4° |  8.9 mp/h |
| Tuesday, May 7 | Good 29 AQI US | | 64.4° 53.6° | 20.1 mp/h |
| Wednesday, May 8 | Good 18 AQI US | | 59° 46.4° | 11.2 mp/h |
| Today | Good 17 AQI US | | 59° 46.4° | 11.2 mp/h |
| Friday, May 10 | Good 38 AQI US | | 51.8° 44.6° | 11.2 mp/h |
| Saturday, May 11 | Moderate 51 AQI US  | 40% | 51.8° 44.6° | 4.5 mp/h |
| Sunday, May 12 | Good 49 AQI US | 50% | 55.4° 44.6° | 11.2 mp/h |
| Monday, May 13 | Good 36 AQI US | 100% | 60.8° 50° | 17.9 mp/h |
| Tuesday, May 14 | Moderate 56 AQI US | 100% | 57.2° 53.6° | 11.2 mp/h |
| Wednesday, May 15 | Moderate 65 AQI US | | 59° 53.6° | 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