Live

Cergy Pontoise Ozone (O₃) Level

Cergy, Ile De France, France

Ozone (O₃)

44ppb

Good

Last Updated: 2026-07-14 00:01 (Local Time)

Map

Cergy Pontoise

Good

050

Moderate

100

Poor

168

Unhealthy

208

Severe

748

Hazardous

1250+

What is the Current O₃ Level?
Cergy Pontoise

The current O₃ level at Cergy Pontoise is 44 ppb making it healthy and safe for everyone in the area.

1.1xBelow

The current O₃ level in Cergy Pontoise is 1.1x Below the recommended WHO guideline of 50.96 ppb.

AQI Graph

Historic Air Quality Graph of Ozone (O₃)
Cergy Pontoise

24 Hours

O₃

Cergy Pontoise

O₃ (ppb)

13-07-2026Time14-07-2026

Time	Cergy Pontoise
12:01am	45
12:31am	50
1:01am	47
1:31am	45
2:01am	43
2:31am	45
3:01am	46
3:31am	47
4:01am	46
4:31am	47
5:01am	45
5:31am	39
6:01am	44
6:31am	36
7:01am	35
7:31am	30
8:01am	32
8:31am	29
9:01am	32
9:31am	30
10:01am	31
10:31am	29
11:01am	28
11:31am	26
12:01pm	28
12:31pm	31
1:01pm	29
1:31pm	36
2:01pm	36
2:31pm	35
3:01pm	35
3:31pm	44
4:01pm	45
4:31pm	48
5:01pm	46
5:31pm	43
6:01pm	47
6:31pm	48
7:01pm	45
7:31pm	42
8:01pm	49
8:31pm	43
9:01pm	43
9:31pm	49
10:01pm	46
10:31pm	45
11:01pm	48
11:31pm	51
12:01am	44

Min. O₃11:31am

Max. O₃11:31pm

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 Pontoise

Frequently Asked Questions About Air Quality

1. What is the current O₃ level in Cergy Pontoise?

The current real-time O₃ level in Cergy Pontoise is 44ppb (Good). This was last updated 2026-07-14 00:01 (Local Time).

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

The best O₃ level was 26 ppb (Good) at 11:31 AM (Local Time) during the last 24 hours.

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

The worst O₃ level was 51 ppb (Moderate) at 11:31 PM (Local Time) during the last 24 hours.

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

The O₃ levels in Cergy Pontoise have been fluctuating throughout the last 24 hours. The levels have increased by highest 51 ppb at 11:31 PM (Local Time), lowest 26 ppb at 11:31 AM (Local Time).

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

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