Ontario Air Quality Index (AQI) | Air Pollution
Real-time PM2.5, PM10 air pollution level in Ontario
Last Updated: 2026-06-04 16:01 (Local Time)
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0Cigarettes per day
Breathe easy and get active! The air quality is perfect for enjoying outdoor activities.
Source:
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Most Polluted Cities 2026
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Analyze the real-time most air polluted cities in the country.
Standard Value
1.
Ocala, Florida
Moderate
15xbelow Standard
2.
Gainesville, Florida
Moderate
15xbelow Standard
3.
Palatka, Florida
Moderate
15xbelow Standard
4.
Anaheim, California
Moderate
15xbelow Standard
5.
Socorro, Texas
Moderate
15xbelow Standard
6.
Jurupa Valley, California
Moderate
8xbelow Standard
7.
Riverside, California
Moderate
8xbelow Standard
8.
Ontario, California
Moderate
15xbelow Standard
9.
Glendora, California
Moderate
15xbelow Standard
10.
Carlsbad, New Mexico
Moderate
15xbelow Standard
Last Updated: 04 Jun 2026, 10:04 PM
AQI City RankingsAir Quality Solutions For Ontario
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Air Quality FAQs
at Ontario
Frequently Asked Questions About Air Quality
1. What is the current AQI (US) level in Ontario?
The current real-time AQI (US) level in Ontario is 18 (Good). This was last updated 2026-06-04 16:01 (Local Time).
2. When was the best AQI (US) level in Ontario in the last 24 hours?
The best AQI (US) level was 16 (Good) at 10:31 PM, Jun 3, 2026 (Local Time) during the last 24 hours.
3. When was the worst AQI (US) level in Ontario in the last 24 hours?
The worst AQI (US) level was 60 (Moderate) at 4:01 PM, Jun 3, 2026 (Local Time) during the last 24 hours.
4. What is the current trend of AQI (US) levels in Ontario during last 24 hours?
The AQI (US) levels in Ontario have been fluctuating throughout the last 24 hours. The levels have increased by highest 60 at 4:01 PM, Jun 3, 2026 (Local Time), lowest 16 at 10:31 PM, Jun 3, 2026 (Local Time).
5. What actions are recommended as per the current AQI (US) level in Ontario?
The air quality is satisfactory, and air pollution poses little or no risk. No special precautions are needed; enjoy outdoor activities freely.
Recent AQI Blogs
Read the latest news
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