Live

Cergy Ozone (O₃) Level

Ile De France, France

Ozone (O₃)

36ppb

Good

Last Updated: 2026-08-16 03:41:01 (Local Time)

Map

Cergy

Good

050

Moderate

100

Poor

168

Unhealthy

208

Severe

748

Hazardous

1250+

What is the Current O₃ Level?
Cergy

The current O₃ level in Cergy based on the average air quality level across the city is 36 ppb, making it healthy and safe for everyone.

1.4xBelow

The current O₃ level in Cergy is 1.4x Below the recommended WHO guideline of 50.96 ppb.

AQI Graph

Historic Air Quality Graph of Ozone (O₃)
Cergy

24 Hours

O₃

Cergy

O₃ (ppb)

15-08-2026Time16-08-2026

Time	Cergy
4:01am	51
4:31am	46
5:01am	50
5:31am	55
6:01am	46
6:31am	52
7:01am	60
7:31am	50
8:01am	60
8:31am	56
9:01am	53
9:31am	59
10:01am	61
10:31am	54
11:01am	53
11:31am	40
12:01pm	42
12:31pm	47
1:01pm	45
1:31pm	42
2:01pm	40
2:31pm	54
3:01pm	46
3:31pm	49
4:01pm	51
4:31pm	48
5:01pm	50
5:31pm	49
6:01pm	49
6:31pm	53
7:01pm	47
7:31pm	54
8:01pm	53
8:31pm	53
9:01pm	46
9:31pm	53
10:01pm	47
10:31pm	49
11:01pm	56
11:31pm	57
12:01am	56
12:31am	56
1:01am	56
1:31am	46
2:01am	42
2:31am	38
3:01am	37
3:31am	37

Min. O₃3:01am

Max. O₃10:01am

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 Cergy

Frequently Asked Questions About Air Quality

1. What is the current O₃ level in Cergy?

The current real-time O₃ level in Cergy is 36ppb (Good). This was last updated 2026-08-16 03:41:01 (Local Time).

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

The best O₃ level was 37 ppb (Good) at 3:01 AM (Local Time) during the last 24 hours.

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

The worst O₃ level was 61 ppb (Moderate) at 10:01 AM, Aug 15, 2026 (Local Time) during the last 24 hours.

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

The O₃ levels in Cergy have been fluctuating throughout the last 24 hours. The levels have increased by highest 61 ppb at 10:01 AM, Aug 15, 2026 (Local Time), lowest 37 ppb at 3:01 AM (Local Time).

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

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