Live

Saint Fons Ozone (O₃) Level

Venissieux, Auvergne Rhone Alpes, France

Ozone (O₃)

31ppb

Good

Last Updated: 2026-07-13 22:21:02 (Local Time)

Map

Saint Fons

Good

050

Moderate

100

Poor

168

Unhealthy

208

Severe

748

Hazardous

1250+

What is the Current O₃ Level?
Saint Fons

The current O₃ level at Saint Fons is 31 ppb making it healthy and safe for everyone in the area.

1.6xBelow

The current O₃ level in Saint Fons is 1.6x Below the recommended WHO guideline of 50.96 ppb.

AQI Graph

Historic Air Quality Graph of Ozone (O₃)
Saint Fons

24 Hours

O₃

Saint Fons

O₃ (ppb)

12-07-2026Time13-07-2026

Time	Saint Fons
10:31pm	35
11:01pm	33
11:31pm	29
12:01am	34
12:31am	33
1:01am	27
1:31am	27
2:01am	29
2:31am	26
3:01am	29
3:31am	25
4:01am	27
4:31am	26
5:01am	30
5:31am	33
6:01am	32
6:31am	34
7:01am	29
7:31am	35
8:01am	30
8:31am	33
9:01am	30
9:31am	31
10:01am	33
10:31am	29
11:01am	31
11:31am	32
12:01pm	30
12:31pm	31
1:01pm	30
1:31pm	33
2:01pm	31
2:31pm	33
3:01pm	27
3:31pm	27
4:01pm	26
4:31pm	30
5:01pm	28
5:31pm	28
6:01pm	28
6:31pm	29
7:01pm	28
7:31pm	30
8:01pm	26
8:31pm	29
9:01pm	31
9:31pm	26
10:01pm	31

Min. O₃3:31am

Max. O₃10:31pm

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 Saint Fons

Frequently Asked Questions About Air Quality

1. What is the current O₃ level in Saint Fons?

The current real-time O₃ level in Saint Fons is 31ppb (Good). This was last updated 2026-07-13 22:21:02 (Local Time).

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

The best O₃ level was 25 ppb (Good) at 3:31 AM (Local Time) during the last 24 hours.

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

The worst O₃ level was 35 ppb (Good) at 10:31 PM, Jul 12, 2026 (Local Time) during the last 24 hours.

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

The O₃ levels in Saint Fons have been fluctuating throughout the last 24 hours. The levels have increased by highest 35 ppb at 10:31 PM, Jul 12, 2026 (Local Time), lowest 25 ppb at 3:31 AM (Local Time).

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

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