AQI History PM₂.₅ PM₁₀ CO SO₂ NO₂ O₃

Live

Hachioji Ozone (O₃) Level

Tokyo, Japan

location image

Ozone (O₃)

43ppb

Good

Last Updated: 2026-06-05 16:41:03 (Local Time)

Hachioji

Good

050

Moderate

100

Poor

168

Unhealthy

208

Severe

748

Hazardous

1250+

What is the Current O₃ Level?
Hachioji

The current O₃ level in Hachioji based on the average air quality level across the city is 43 ppb, making it healthy and safe for everyone.

1.1xBelow

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

AQI Graph

Historic Air Quality Graph of Ozone (O₃)
Hachioji

24 Hours

O₃

Hachioji

O₃ (ppb)

.

04-06-2026Time05-06-2026

Time	Hachioji
5:01pm	38
5:31pm	36
6:01pm	38
6:31pm	37
7:01pm	37
7:31pm	37
8:01pm	37
8:31pm	36
9:01pm	35
9:31pm	35
10:01pm	34
10:31pm	33
11:01pm	33
11:31pm	32
12:01am	33
12:31am	31
1:01am	32
1:31am	32
2:01am	32
2:31am	31
3:01am	30
3:31am	31
4:01am	30
4:31am	32
5:01am	32
5:31am	33
6:01am	32
6:31am	32
7:01am	32
7:31am	32
8:01am	32
8:31am	32
9:01am	33
9:31am	33
10:01am	35
10:31am	33
11:01am	33
11:31am	35
12:01pm	35
12:31pm	36
1:01pm	38
1:31pm	39
2:01pm	40
2:31pm	42
3:01pm	41
3:31pm	43
4:01pm	41
4:31pm	43

30

Min. O₃3:01am

43

Max. O₃3:31pm

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

Refineries

Industrial processes emit substances.

Power plants

Power plants

Emissions from burning fossil fuels.

Paints evaporations

Paints evaporations

Vocs from paints react with sunlight.

Transportation

Transportation

Diesel operated vehicles reacts and form ozone.

Short-Term O₃ Exposure Impacts

Chest pain

Chest pain

Discomfort or pain in the chest due to respiratory stress.

Breathing shortness

Breathing shortness

Difficulty in breathing or feeling of breathlessness.

Respiratory irritation

Respiratory irritation

Inflammation and irritation of the respiratory tract.

Wheezing and coughing

Wheezing and coughing

Whistling sound and persistent cough.

Trigger asthma attacks

Trigger asthma attacks

Aggravation of asthma symptoms.

Why you should care about Ozone (O₃)?

Know More About O₃ Sensor

Air Quality FAQs
at Hachioji

Frequently Asked Questions About Air Quality

1. What is the current O₃ level in Hachioji?

The current real-time O₃ level in Hachioji is 43ppb (Good). This was last updated 2026-06-05 16:41:03 (Local Time).

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

The best O₃ level was 30 ppb (Good) at 3:01 AM (Local Time) during the last 24 hours.

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

The worst O₃ level was 43 ppb (Good) at 3:31 PM (Local Time) during the last 24 hours.

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

The O₃ levels in Hachioji remained stable over the last 24 hours as around 33.979166666666664 ppb.

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

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