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 Ontario
Air quality index (AQI) and PM2.5 air pollution in Ontario
443 people follow this city
Ontario Air Quality Map
Real-time Ontario air pollution map
AIR QUALITY DATA CONTRIBUTORS
2 Contributors
See all
Pollen
What is the pollen count in Ontario today?
 | Index | Very high | |
 | Tree pollen | Low | |
 | Grass pollen | Very high | |
 | Weed pollen | None |
Source: tomorrow.io
Weather
What is the current weather in Ontario?
| Weather | Clear sky |
| Temperature | 60.8°F |
| Humidity | 52% |
| Wind | 11.5 mp/h |
| Pressure | 30 Hg |
live aqi city ranking
Real-time USA city ranking
| # | city | US AQI |
|---|---|---|
| 1 |  Lincoln, Nebraska | 103 |
| 2 | Oklahoma City, Oklahoma | 98 |
| 3 | Decorah, Iowa | 94 |
| 4 | Wichita, Kansas | 90 |
| 5 | Edmond, Oklahoma | 89 |
| 6 | Mecca, California | 88 |
| 7 | Rochester, Minnesota | 85 |
| 8 | Champaign, Illinois | 82 |
| 9 | Coggon, Iowa | 81 |
| 10 | Urbana, Illinois | 80 |
(local time)
SEE WORLD AQI RANKING
3D animated air pollution map
live Ontario aqi ranking
Real-time Ontario air quality ranking
| # | station | US AQI |
|---|---|---|
| 1 | Owyhee Dead Ox Ontario | 15 |
| 2 | Ontario May Roberts Elementary School | 14 |
(local time)
SEE WORLD AQI RANKING
US AQI
14
live AQI index
Good
Overview
What is the current air quality in Ontario?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Good | 14 US AQI | PM2.5 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 2.6µg/m³ | |
✓
PM2.5 concentration in Ontario air currently meets the WHO annual air quality guideline value
Health Recommendations
What is the current air quality in Ontario?
 | Enjoy outdoor activities |
 | Open your windows to bring clean, fresh air indoors GET A MONITOR |
Forecast
Ontario air quality index (AQI) forecast
| Day | Pollution level | Weather | Temperature | Wind |
|---|---|---|---|---|
| Sunday, May 12 | Good 23 AQI US |  | 82.4° 57.2° |  8.9 mp/h |
| Monday, May 13 | Good 16 AQI US |  | 77° 51.8° | 8.9 mp/h |
| Tuesday, May 14 | Good 17 AQI US |  | 75.2° 50° | 6.7 mp/h |
| Today | Good 14 AQI US | | 75.2° 50° | 6.7 mp/h |
| Thursday, May 16 | Good 15 AQI US | | 82.4° 55.4° | 11.2 mp/h |
| Friday, May 17 | Good 8 AQI US | | 69.8° 53.6° | 22.4 mp/h |
| Saturday, May 18 | Good 7 AQI US | | 69.8° 42.8° | 6.7 mp/h |
| Sunday, May 19 | Good 12 AQI US | | 64.4° 48.2° | 13.4 mp/h |
| Monday, May 20 | Good 7 AQI US | | 68° 41° | 6.7 mp/h |
| Tuesday, May 21 | Good 8 AQI US |  80% | 59° 48.2° | 13.4 mp/h |
Interested in hourly forecast? Get the app
News
The latest air quality news and resources.
How to best protect from air pollution?
Ontario air quality data attribution
3 Data sources
Data validated and calibrated by IQAirWhere is the cleanest air quality in Ontario?
AQI US, Metric