Tseung Kwan O Tunnel Ozone (O3) Level
Sai Kung District, Hong Kong, China
60ppb
Last Updated: 16 Nov 2025, 04:46am (Local Time)
MapTseung Kwan O Tunnel
What is the Current O3 Level?
Tseung Kwan O Tunnel
The current O3 level at Tseung Kwan O Tunnel is 60 ppb making it acceptable, but sensitive individuals should be cautious.
The current O3 level in Tseung Kwan O Tunnel is 1.1x Above the recommended WHO guideline of 50.96 ppb.
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AQI Graph
Historical Air Quality Data
Tseung Kwan O Tunnel
Download 2024 Annual Data
World Air Quality Report
Do you know that Ozone's total mass is 3 billion metric tons in the atmosphere? It looks like a lot but has only 0.00006% of the atmosphere. Besides, Ozone's peak concentration is 32 kilometres above the Earth's surface.
Uncovering the Sources of Ozone (O3): Where Does It Come From?
Refineries
Industrial processes emit substances.
Power plants
Emissions from burning fossil fuels.
Paints evaporations
Vocs from paints react with sunlight.
Transportation
Diesel operated vehicles reacts and form ozone.Short-Term O3 Exposure Impacts
Chest pain
Discomfort or pain in the chest due to respiratory stress.
Breathing shortness
Difficulty in breathing or feeling of breathlessness.
Respiratory irritation
Inflammation and irritation of the respiratory tract.
Wheezing and coughing
Whistling sound and persistent cough.
Trigger asthma attacks
Aggravation of asthma symptoms.Why you should care about Ozone (O3)?
Know More About O3 Sensor
Air Quality FAQs
at Tseung Kwan O Tunnel
Frequently Asked Questions About Air Quality
What is the current O3 level in Tseung Kwan O Tunnel?
The current real-time O3 level in Tseung Kwan O Tunnel is 60 ppb (Moderate). This was last updated 16 Nov 2025, 04:46am (Local Time).
When was the best O3 level in Tseung Kwan O Tunnel in the last 24 hours?
The best O3 level was 39 ppb (Good) at 11:04 AM (Local Time) during the last 24 hours.
When was the worst O3 level in Tseung Kwan O Tunnel in the last 24 hours?
The worst O3 level was 71 ppb (Moderate) at 5:04 PM (Local Time) during the last 24 hours.
What is the current trend of O3 levels in Tseung Kwan O Tunnel during last 24 hours?
The O3 levels in Tseung Kwan O Tunnel have been fluctuating throughout the last 24 hours. The levels have increased by highest 71 ppb at 5:04 PM (Local Time), lowest 39 ppb at 11:04 AM (Local Time).
What actions are recommended as per the current O3 level in Tseung Kwan O Tunnel?
Current O3 levels are acceptable; however, some pollutants may be a concern for a small number of sensitive individuals.
