Live

Shannon Ozone (O₃) Level

Quebec, Canada

Ozone (O₃)

35ppb

Good

Last Updated: 2026-06-03 22:21:01 (Local Time)

Map

Shannon

Good

050

Moderate

100

Poor

168

Unhealthy

208

Severe

748

Hazardous

1250+

What is the Current O₃ Level?
Shannon

The current O₃ level in Shannon based on the average air quality level across the city is 35 ppb, making it healthy and safe for everyone.

1.4xBelow

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

AQI Graph

Historic Air Quality Graph of Ozone (O₃)
Shannon

24 Hours

O₃

Shannon

O₃ (ppb)

02-06-2026Time03-06-2026

Time	Shannon
10:31pm	34
11:01pm	30
11:31pm	31
12:01am	29
12:31am	28
1:01am	22
1:31am	23
2:01am	20
2:31am	19
3:01am	21
3:31am	20
4:01am	18
4:31am	19
5:01am	16
5:31am	17
6:01am	17
6:31am	17
7:01am	17
7:31am	18
8:01am	17
8:31am	19
9:01am	19
9:31am	22
10:01am	22
10:31am	19
11:01am	25
11:31am	23
12:01pm	30
12:31pm	27
1:01pm	28
1:31pm	29
2:01pm	33
2:31pm	33
3:01pm	35
3:31pm	32
4:01pm	31
4:31pm	33
5:01pm	37
5:31pm	35
6:01pm	33
6:31pm	35
7:01pm	31
7:31pm	33
8:01pm	36
8:31pm	36
9:01pm	37
9:31pm	34
10:01pm	37

Min. O₃5:01am

Max. O₃5:01pm

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 Shannon

Frequently Asked Questions About Air Quality

What is the current O₃ level in Shannon?

The current real-time O₃ level in Shannon is 35ppb (Good). This was last updated 2026-06-03 22:21:01 (Local Time).

When was the best O₃ level in Shannon in the last 24 hours?

The best O₃ level was 16 ppb (Good) at 5:01 AM, Jun 3, 2026 (Local Time) during the last 24 hours.

When was the worst O₃ level in Shannon in the last 24 hours?

The worst O₃ level was 37 ppb (Good) at 5:01 PM, Jun 3, 2026 (Local Time) during the last 24 hours.

What is the current trend of O₃ levels in Shannon during last 24 hours?

The O₃ levels in Shannon have been fluctuating throughout the last 24 hours. The levels have increased by highest 37 ppb at 5:01 PM, Jun 3, 2026 (Local Time), lowest 16 ppb at 5:01 AM, Jun 3, 2026 (Local Time).

What actions are recommended as per the current O₃ level in Shannon?

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