Great Background Ozone (O₃) Level
Saint Denis, Reunion, France
20ppb
Last Updated: 2026-08-04 23:31 (Local Time)
MapGreat Background
What is the Current O₃ Level?
Great Background
The current O₃ level at Great Background is 20 ppb making it healthy and safe for everyone in the area.
The current O₃ level in Great Background is 2.5x Below the recommended WHO guideline of 50.96 ppb.
AQI Graph
Historic Air Quality Graph of Ozone (O₃)
Great Background
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 Great Background
Frequently Asked Questions About Air Quality
1. What is the current O₃ level in Great Background?
1. What is the current O₃ level in Great Background?
The current real-time O₃ level in Great Background is 20ppb (Good). This was last updated 2026-08-04 23:31 (Local Time).
2. When was the best O₃ level in Great Background in the last 24 hours?
2. When was the best O₃ level in Great Background in the last 24 hours?
The best O₃ level was 13 ppb (Good) at 11:01 AM (Local Time) during the last 24 hours.
3. When was the worst O₃ level in Great Background in the last 24 hours?
3. When was the worst O₃ level in Great Background in the last 24 hours?
The worst O₃ level was 22 ppb (Good) at 5:31 PM (Local Time) during the last 24 hours.
4. What is the current trend of O₃ levels in Great Background during last 24 hours?
4. What is the current trend of O₃ levels in Great Background during last 24 hours?
The O₃ levels in Great Background have been fluctuating throughout the last 24 hours. The levels have increased by highest 22 ppb at 5:31 PM (Local Time), lowest 13 ppb at 11:01 AM (Local Time).
5. What actions are recommended as per the current O₃ level in Great Background?
5. What actions are recommended as per the current O₃ level in Great Background?
The air quality is satisfactory, and air pollution poses little or no risk. No special precautions are needed; enjoy outdoor activities freely.
