Live

Lethbridge Ozone (O₃) Level

Alberta, Canada

Ozone (O₃)

32ppb

Good

Last Updated: 2026-06-03 16:31 (Local Time)

Map

Lethbridge

Good

050

Moderate

100

Poor

168

Unhealthy

208

Severe

748

Hazardous

1250+

What is the Current O₃ Level?
Lethbridge

The current O₃ level in Lethbridge based on the average air quality level across the city is 32 ppb, making it healthy and safe for everyone.

1.5xBelow

The current O₃ level in Lethbridge is 1.5x Below the recommended WHO guideline of 50.96 ppb.

AQI Graph

Historic Air Quality Graph of Ozone (O₃)
Lethbridge

24 Hours

O₃

Lethbridge

O₃ (ppb)

02-06-2026Time03-06-2026

Time	Lethbridge
4:31pm	26
5:01pm	28
5:31pm	26
6:01pm	25
6:31pm	26
7:01pm	26
7:31pm	24
8:01pm	26
8:31pm	26
9:01pm	26
9:31pm	25
10:01pm	24
10:31pm	24
11:01pm	25
11:31pm	24
12:01am	23
12:31am	24
1:01am	22
1:31am	20
2:01am	21
2:31am	21
3:01am	20
3:31am	20
4:01am	18
4:31am	18
5:01am	17
5:31am	18
6:01am	16
6:31am	17
7:01am	17
7:31am	16
8:01am	14
8:31am	15
9:01am	15
9:31am	16
10:01am	14
10:31am	14
11:01am	14
11:31am	14
12:01pm	14
12:31pm	19
1:01pm	20
1:31pm	20
2:01pm	22
2:31pm	27
3:01pm	27
3:31pm	26
4:01pm	29
4:31pm	30
5:01pm	27
5:31pm	28
6:01pm	31
6:31pm	31

Min. O₃8:01am

Max. O₃6:01pm

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 Lethbridge

Frequently Asked Questions About Air Quality

What is the current O₃ level in Lethbridge?

The current real-time O₃ level in Lethbridge is 32ppb (Good). This was last updated 2026-06-03 16:31 (Local Time).

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

The best O₃ level was 14 ppb (Good) at 8:01 AM (Local Time) during the last 24 hours.

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

The worst O₃ level was 31 ppb (Good) at 6:01 PM (Local Time) during the last 24 hours.

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

The O₃ levels in Lethbridge have been fluctuating throughout the last 24 hours. The levels have increased by highest 31 ppb at 6:01 PM (Local Time), lowest 14 ppb at 8:01 AM (Local Time).

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

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