Live

Grand Avenue West Ozone (O₃) Level

Chatham, Ontario, Canada

Ozone (O₃)

41ppb

Good

Last Updated: 2026-08-16 14:41:01 (Local Time)

Map

Grand Avenue West

Good

050

Moderate

100

Poor

168

Unhealthy

208

Severe

748

Hazardous

1250+

What is the Current O₃ Level?
Grand Avenue West

The current O₃ level at Grand Avenue West is 41 ppb making it healthy and safe for everyone in the area.

1.2xBelow

The current O₃ level in Grand Avenue West is 1.2x Below the recommended WHO guideline of 50.96 ppb.

AQI Graph

Historic Air Quality Graph of Ozone (O₃)
Grand Avenue West

24 Hours

O₃

Grand Avenue West

O₃ (ppb)

15-08-2026Time16-08-2026

Time	Grand Avenue West
3:01pm	30
3:31pm	29
4:01pm	32
4:31pm	34
5:01pm	37
5:31pm	32
6:01pm	38
6:31pm	34
7:01pm	35
7:31pm	34
8:01pm	35
8:31pm	36
9:01pm	39
9:31pm	33
10:01pm	32
10:31pm	35
11:01pm	33
11:31pm	37
12:01am	35
12:31am	37
1:01am	38
1:31am	40
2:01am	35
2:31am	33
3:01am	38
3:31am	35
4:01am	32
4:31am	28
5:01am	29
5:31am	29
6:01am	23
6:31am	24
7:01am	20
7:31am	21
8:01am	16
8:31am	18
9:01am	19
9:31am	18
10:01am	18
10:31am	17
11:01am	25
11:31am	25
12:01pm	30
12:31pm	28
1:01pm	29
1:31pm	33
2:01pm	38
2:31pm	37

Min. O₃8:01am

Max. O₃1:31am

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 Grand Avenue West

Frequently Asked Questions About Air Quality

1. What is the current O₃ level in Grand Avenue West?

The current real-time O₃ level in Grand Avenue West is 41ppb (Good). This was last updated 2026-08-16 14:41:01 (Local Time).

2. When was the best O₃ level in Grand Avenue West in the last 24 hours?

The best O₃ level was 16 ppb (Good) at 8:01 AM (Local Time) during the last 24 hours.

3. When was the worst O₃ level in Grand Avenue West in the last 24 hours?

The worst O₃ level was 40 ppb (Good) at 1:31 AM (Local Time) during the last 24 hours.

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

The O₃ levels in Grand Avenue West have been fluctuating throughout the last 24 hours. The levels have increased by highest 40 ppb at 1:31 AM (Local Time), lowest 16 ppb at 8:01 AM (Local Time).

5. What actions are recommended as per the current O₃ level in Grand Avenue West?

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