Marseille St Louis Ozone (O₃) Level
Marseille, Provence Alpes Cote dAzur, France
3ppb
Last Updated: 2026-09-25 15:51:01 (Local Time)
MapMarseille St Louis
What is the Current O₃ Level?
Marseille St Louis
The current O₃ level at Marseille St Louis is 3 ppb making it healthy and safe for everyone in the area.
The current O₃ level in Marseille St Louis is 16.9x Below the recommended WHO guideline of 50.96 ppb.
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AQI Graph
Historic Air Quality Graph of Ozone (O₃)
Marseille St Louis
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 Marseille St Louis
Frequently Asked Questions About Air Quality
1. What is the current O₃ level in Marseille St Louis?
1. What is the current O₃ level in Marseille St Louis?
The current real-time O₃ level in Marseille St Louis is 3ppb (Good). This was last updated 2026-09-25 15:51:01 (Local Time).
2. When was the best O₃ level in Marseille St Louis in the last 24 hours?
2. When was the best O₃ level in Marseille St Louis in the last 24 hours?
The best O₃ level was 3 ppb (Good) at 4:01 PM, Sep 24, 2026 (Local Time) during the last 24 hours.
3. When was the worst O₃ level in Marseille St Louis in the last 24 hours?
3. When was the worst O₃ level in Marseille St Louis in the last 24 hours?
The worst O₃ level was 5 ppb (Good) at 7:01 PM, Sep 24, 2026 (Local Time) during the last 24 hours.
4. What is the current trend of O₃ levels in Marseille St Louis during last 24 hours?
4. What is the current trend of O₃ levels in Marseille St Louis during last 24 hours?
The O₃ levels in Marseille St Louis remained stable over the last 24 hours as around 3.1875 ppb.
5. What actions are recommended as per the current O₃ level in Marseille St Louis?
5. What actions are recommended as per the current O₃ level in Marseille St Louis?
The air quality is satisfactory, and air pollution poses little or no risk. No special precautions are needed; enjoy outdoor activities freely.
