Live

Cardiff Centre Ozone (O₃) Level

Caerdydd, Cardiff, United Kingdom

Ozone (O₃)

5ppb

Good

Last Updated: 2026-08-17 05:51 (Local Time)

Map

Cardiff Centre

Good

050

Moderate

100

Poor

168

Unhealthy

208

Severe

748

Hazardous

1250+

What is the Current O₃ Level?
Cardiff Centre

The current O₃ level at Cardiff Centre is 5 ppb making it healthy and safe for everyone in the area.

10.1xBelow

The current O₃ level in Cardiff Centre is 10.1x Below the recommended WHO guideline of 50.96 ppb.

AQI Graph

Historic Air Quality Graph of Ozone (O₃)
Cardiff Centre

24 Hours

O₃

Cardiff Centre

O₃ (ppb)

16-08-2026Time17-08-2026

Time	Cardiff Centre
6:01am	2
6:31am	2
7:01am	2
7:31am	2
8:01am	2
8:31am	2
9:01am	2
9:31am	2
10:01am	2
10:31am	2
11:01am	2
11:31am	2
12:01pm	5
12:31pm	5
1:01pm	7
1:31pm	6
2:01pm	6
2:31pm	6
3:01pm	5
3:31pm	9
4:01pm	8
4:31pm	11
5:01pm	14
5:31pm	13
6:01pm	13
6:31pm	13
7:01pm	13
7:31pm	14
8:01pm	15
8:31pm	13
9:01pm	11
9:31pm	10
10:01pm	11
10:31pm	7
11:01pm	7
11:31pm	7
12:01am	7
12:31am	8
1:01am	7
1:31am	6
2:01am	6
2:31am	5
3:01am	5
3:31am	5
4:01am	5
4:31am	5
5:01am	5
5:31am	5

Min. O₃6:01am

Max. O₃8:01pm

Want air quality data?

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 Cardiff Centre

Frequently Asked Questions About Air Quality

1. What is the current O₃ level in Cardiff Centre?

The current real-time O₃ level in Cardiff Centre is 5ppb (Good). This was last updated 2026-08-17 05:51 (Local Time).

2. When was the best O₃ level in Cardiff Centre in the last 24 hours?

The best O₃ level was 2 ppb (Good) at 6:01 AM, Aug 16, 2026 (Local Time) during the last 24 hours.

3. When was the worst O₃ level in Cardiff Centre in the last 24 hours?

The worst O₃ level was 15 ppb (Good) at 8:01 PM, Aug 16, 2026 (Local Time) during the last 24 hours.

4. What is the current trend of O₃ levels in Cardiff Centre during last 24 hours?

The O₃ levels in Cardiff Centre have been fluctuating throughout the last 24 hours. The levels have increased by highest 15 ppb at 8:01 PM, Aug 16, 2026 (Local Time), lowest 2 ppb at 6:01 AM, Aug 16, 2026 (Local Time).

5. What actions are recommended as per the current O₃ level in Cardiff Centre?

The air quality is satisfactory, and air pollution poses little or no risk. No special precautions are needed; enjoy outdoor activities freely.