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
10 people follow this city
Ontario Air Quality Map
Real-time Ontario air pollution map
AIR QUALITY DATA CONTRIBUTORS
Anonymous contributor
See all
Pollen
What is the pollen count in Ontario today?
 | Index | Very high | |
 | Tree pollen | Very high | |
 | Grass pollen | High | |
 | Weed pollen | None |
Source: tomorrow.io
Weather
What is the current weather in Ontario?
| Weather | Broken clouds |
| Temperature | 69.8°F |
| Humidity | 81% |
| Wind | 5.7 mp/h |
| Pressure | 30 Hg |
live aqi city ranking
Real-time USA city ranking
| # | city | US AQI |
|---|---|---|
| 1 |  Mecca, California | 81 |
| 2 | Yucaipa, California | 72 |
| 3 | Fort Worth, Texas | 69 |
| 4 | Lewisville, Texas | 68 |
| 5 | Midlothian, Texas | 68 |
| 6 | Pahrump, Nevada | 68 |
| 7 | San Bernardino, California | 68 |
| 8 | Aliquippa, Pennsylvania | 66 |
| 9 | Amador, California | 66 |
| 10 | Beaver, Pennsylvania | 66 |
(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 | Park Avenue West | 42 |
(local time)
SEE WORLD AQI RANKING
US AQI
42
live AQI index
Good
Overview
What is the current air quality in Ontario?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Good | 42 US AQI | PM2.5 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 7.7µg/m³ | |
!
PM2.5
x1.5
PM2.5 concentration in Ontario is currently 1.5 times 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 |
|---|---|---|---|---|
| Thursday, May 30 | Good 31 AQI US |  | 69.8° 42.8° |  4.5 mp/h |
| Friday, May 31 | Good 36 AQI US |  | 73.4° 50° | 8.9 mp/h |
| Saturday, Jun 1 | Good 40 AQI US | | 69.8° 57.2° | 11.2 mp/h |
| Saturday, Jun 1 | Good 39 AQI US | 100% | 69.8° 57.2° | 11.2 mp/h |
| Today | Good 42 AQI US | 40% | 77° 57.2° | 6.7 mp/h |
| Monday, Jun 3 | Moderate 58 AQI US  | | 78.8° 60.8° | 8.9 mp/h |
| Tuesday, Jun 4 | Moderate 62 AQI US | 100% | 73.4° 62.6° | 17.9 mp/h |
| Wednesday, Jun 5 | Good 43 AQI US | 100% | 71.6° 53.6° | 13.4 mp/h |
| Thursday, Jun 6 | Good 11 AQI US | 90% | 55.4° 50° | 15.7 mp/h |
| Friday, Jun 7 | Good 18 AQI US | 100% | 55.4° 51.8° | 15.7 mp/h |
| Saturday, Jun 8 | Good 32 AQI US | 100% | 69.8° 55.4° | 15.7 mp/h |
Interested in hourly forecast? Get the app
News
The latest air quality news and resources.
How to best protect from air pollution?
Ontario air quality data attribution
1Contributor
- 1 Anonymous contributor
1 station
Anonymous Contributor
1 Data source
Data validated and calibrated by IQAirWhere is the cleanest air quality in Ontario?
AQI US, Metric