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
35 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 | Moderate | |
 | Weed pollen | None |
Source: tomorrow.io
Weather
What is the current weather in Ontario?
| Weather | Clear sky |
| Temperature | 64.4°F |
| Humidity | 59% |
| Wind | 9 mp/h |
| Pressure | 30.2 Hg |
live aqi city ranking
Real-time USA city ranking
| # | city | US AQI |
|---|---|---|
| 1 |  Hollywood, California | 84 |
| 2 | Glendora, California | 77 |
| 3 | San Fernando, California | 74 |
| 4 | La Crescenta-Montrose, California | 71 |
| 5 | Three Rivers, California | 71 |
| 6 | Sierra Madre, California | 69 |
| 7 | Yucaipa, California | 69 |
| 8 | Altadena, California | 68 |
| 9 | Claremont, California | 68 |
| 10 | La Verne, California | 68 |
(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 | Ontario Drive | 18 |
(local time)
SEE WORLD AQI RANKING
US AQI
18
live AQI index
Good
Overview
What is the current air quality in Ontario?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Good | 18 US AQI | PM2.5 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 3.3µg/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 |
|---|---|---|---|---|
| Tuesday, May 28 | Good 9 AQI US |  | 60.8° 51.8° |  8.9 mp/h |
| Wednesday, May 29 | Good 13 AQI US | | 60.8° 48.2° | 11.2 mp/h |
| Thursday, May 30 | Good 14 AQI US |  | 66.2° 46.4° | 11.2 mp/h |
| Today | Good 18 AQI US | | 64.4° 50° | 11.2 mp/h |
| Saturday, Jun 1 | Good 48 AQI US | 40% | 68° 55.4° | 8.9 mp/h |
| Sunday, Jun 2 | Moderate 61 AQI US  | 40% | 66.2° 57.2° | 4.5 mp/h |
| Monday, Jun 3 | Moderate 64 AQI US | | 75.2° 59° | 11.2 mp/h |
| Tuesday, Jun 4 | Good 49 AQI US | 30% | 73.4° 60.8° | 17.9 mp/h |
| Wednesday, Jun 5 | Good 50 AQI US | 100% | 68° 55.4° | 15.7 mp/h |
| Thursday, Jun 6 | Good 19 AQI US | 70% | 59° 50° | 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