Zalla Ozone (O₃) Level
Portugalete, Basque Country, Spain
14ppb
Last Updated: 2026-08-16 09:11:01 (Local Time)

Zalla
What is the Current O₃ Level?
Zalla
The current O₃ level at Zalla is 14 ppb making it healthy and safe for everyone in the area.
The current O₃ level in Zalla is 3.6x Below the recommended WHO guideline of 50.96 ppb.
AQI Graph
Historic Air Quality Graph of Ozone (O₃)
Zalla
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 Zalla
Frequently Asked Questions About Air Quality
1. What is the current O₃ level in Zalla?
1. What is the current O₃ level in Zalla?
The current real-time O₃ level in Zalla is 14ppb (Good). This was last updated 2026-08-16 09:11:01 (Local Time).
2. When was the best O₃ level in Zalla in the last 24 hours?
2. When was the best O₃ level in Zalla in the last 24 hours?
The best O₃ level was 14 ppb (Good) at 7:31 AM (Local Time) during the last 24 hours.
3. When was the worst O₃ level in Zalla in the last 24 hours?
3. When was the worst O₃ level in Zalla in the last 24 hours?
The worst O₃ level was 27 ppb (Good) at 3:31 PM, Aug 15, 2026 (Local Time) during the last 24 hours.
4. What is the current trend of O₃ levels in Zalla during last 24 hours?
4. What is the current trend of O₃ levels in Zalla during last 24 hours?
The O₃ levels in Zalla have been fluctuating throughout the last 24 hours. The levels have increased by highest 27 ppb at 3:31 PM, Aug 15, 2026 (Local Time), lowest 14 ppb at 7:31 AM (Local Time).
5. What actions are recommended as per the current O₃ level in Zalla?
5. What actions are recommended as per the current O₃ level in Zalla?
The air quality is satisfactory, and air pollution poses little or no risk. No special precautions are needed; enjoy outdoor activities freely.