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
9.8K people follow this city
Ontario Air Quality Map
Real-time Ontario air pollution map
AIR QUALITY DATA CONTRIBUTORS
2 Contributors
See all
Weather
What is the current weather in Ontario?
| Weather | Few clouds |
| Temperature | 73.4°F |
| Humidity | 54% |
| Wind | 17.3 mp/h |
| Pressure | 29.9 Hg |
live aqi city ranking
Real-time USA city ranking
| # | city | US AQI |
|---|---|---|
| 1 |  The Woodlands, Texas | 79 |
| 2 | Galena Park, Texas | 74 |
| 3 | Indio, California | 73 |
| 4 | Corpus Christi, Texas | 72 |
| 5 | Pasadena, Texas | 72 |
| 6 | Lancaster, Pennsylvania | 69 |
| 7 | San Gabriel, California | 69 |
| 8 | San Fernando, California | 66 |
| 9 | Baytown, Texas | 65 |
| 10 | Georgetown, Texas | 65 |
(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 | Haven Ave | 57 |
| 2 | Ontario-Route 60 Near Road | 53 |
(local time)
SEE WORLD AQI RANKING
Spotlight
Paramount has "Unhealthy for Sensitive Groups" air quality. See the map and health recommendations.
US AQI
57
live AQI index
Moderate
Overview
What is the current air quality in Ontario?
| Air pollution level | Air quality index | Main pollutant |
|---|---|---|
| Moderate | 57 US AQI | PM2.5 |
| Pollutants | Concentration | |
|---|---|---|
| PM2.5 | 12.1µg/m³ | |
| NO2 | 27.3µg/m³ | |
!
PM2.5
x2.4
PM2.5 concentration in Ontario is currently 2.4 times the WHO annual air quality guideline value
Health Recommendations
What is the current air quality in Ontario?
 | 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
Ontario air quality index (AQI) forecast
| Day | Pollution level | Weather | Temperature | Wind |
|---|---|---|---|---|
| Wednesday, May 15 | Moderate 55 AQI US | | 73.4° 57.2° |  8.9 mp/h |
| Thursday, May 16 | Moderate 63 AQI US | | 73.4° 59° | 8.9 mp/h |
| Friday, May 17 | Moderate 63 AQI US |  | 75.2° 59° | 11.2 mp/h |
| Today | Moderate 57 AQI US | | 75.2° 55.4° | 11.2 mp/h |
| Sunday, May 19 | Moderate 53 AQI US |  | 71.6° 55.4° | 11.2 mp/h |
| Monday, May 20 | Good 34 AQI US  | | 78.8° 55.4° | 8.9 mp/h |
| Tuesday, May 21 | Good 36 AQI US | | 80.6° 60.8° | 11.2 mp/h |
| Wednesday, May 22 | Moderate 62 AQI US | | 71.6° 57.2° | 11.2 mp/h |
| Thursday, May 23 | Good 38 AQI US | | 75.2° 55.4° | 11.2 mp/h |
| Friday, May 24 | Good 23 AQI US | | 75.2° 57.2° | 11.2 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
2Contributors
- California Air Resources Board (CARB)
1 station
Government Contributor
- 1 Anonymous contributor
1 station
Anonymous Contributor
3 Data sources
Data validated and calibrated by IQAirWhere is the cleanest air quality in Ontario?
AQI US, Metric