Ontario Air Quality Index (AQI) | Air Pollution
Real-time PM2.5, PM10 air pollution level in Canada
Last Updated: 2025-10-05 04:16:08 AM (Local Time)
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Historical Air Quality Data
Ontario
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Health Advice For People Living In
Ontario
0Cigarettes per day
Breathe easy and get active! The air quality is perfect for enjoying outdoor activities.
Source:
Berkeley Earth
Solutions for Current AQI
Air PurifierTurn On
Car FilterMust
N95 MaskMust
Stay IndoorMust
Must turn on the air purifier to enjoy fresh air.
Get an Air PurifierPrevent Health Problems: Understand Your Risks
Ontario
Asthma
Heart Issues
Allergies
Sinus
Cold/Flu
Chronic (COPD)
Mild Chances of Asthma
Asthma
Risk of Asthma symptoms is Mild when AQI is Moderate (50-150)
Moderate symptoms including frequent wheezing, noticeable shortness of breath, chest tightness, and persistent cough.
Do's :
Limit outdoor activities when AQI is poor.
Clean indoor air with an air purifier to reduce exposure.
Soothe the respiratory tract with herbal teas or warm water to help alleviate symptoms.
Don'ts :
Exercise outdoors without a mask.
Stay in smoky areas with strong fumes.
Most Polluted Cities 2025
Canada
Analyze the real-time most air polluted cities in the country.
Standard Value
1.
Oakbank, Canada
2.
Mission, Canada
3.
Brossard, Canada
4.
Oliver Paipoonge, Canada
5.
Windsor, Canada
6.
Chilliwack, Canada
7.
Agassiz, Canada
8.
London, Canada
9.
Newmarket, Canada
10.
Barrie, Canada
Last Updated: 05 Oct 2025, 12:20 AM
AQI City RankingsAir Quality Solutions For Ontario
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Ontario's AQI Data Analytics Solutions
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Air Quality FAQs
at Ontario
Frequently Asked Questions About Air Quality
What is the current AQI level in Ontario?
The current real-time AQI level in Ontario is 58 (Moderate). This was last updated 2025-10-05 04:16:08 AM (Local Time).
When was the best AQI level in Ontario in the last 24 hours?
The best AQI level was 48 (Good) at 8:22 PM, Oct 3, 2025 (Local Time) during the last 24 hours.
When was the worst AQI level in Ontario in the last 24 hours?
The worst AQI level was 59 (Moderate) at 3:04 AM, Oct 4, 2025 (Local Time) during the last 24 hours.
What is the current trend of AQI levels in Ontario during last 24 hours?
The AQI levels in Ontario have been fluctuating throughout the last 24 hours. The levels have increased by highest 59 at 3:04 AM, Oct 4, 2025 (Local Time), lowest 48 at 8:22 PM, Oct 3, 2025 (Local Time).
What actions are recommended as per the current AQI level in Ontario?
Current AQI levels are acceptable; however, some pollutants may be a concern for a small number of sensitive individuals.
Recent AQI Blogs
Read the latest news
Here are some latest blogs that you can go through to find out more air pollution.
