Live

Koganei Ozone (O₃) Level

Tokyo, Japan

Ozone (O₃)

10ppb

Good

Last Updated: 2026-08-03 21:21:02 (Local Time)

Map

Koganei

Good

050

Moderate

100

Poor

168

Unhealthy

208

Severe

748

Hazardous

1250+

What is the Current O₃ Level?
Koganei

The current O₃ level in Koganei based on the average air quality level across the city is 10 ppb, making it healthy and safe for everyone.

5.09xBelow

The current O₃ level in Koganei is 5.09x Below the recommended WHO guideline of 50.96 ppb.

AQI Graph

Historic Air Quality Graph of Ozone (O₃)
Koganei

24 Hours

O₃

Koganei

O₃ (ppb)

02-08-2026Time03-08-2026

Time	Koganei
9:31pm	13
10:01pm	10
10:31pm	11
11:01pm	12
11:31pm	11
12:01am	11
12:31am	12
1:01am	9
1:31am	10
2:01am	10
2:31am	10
3:01am	10
3:31am	10
4:01am	11
4:31am	7
5:01am	5
5:31am	5
6:01am	5
6:31am	5
7:01am	5
7:31am	4
8:01am	4
8:31am	5
9:01am	5
9:31am	5
10:01am	5
10:31am	5
11:01am	5
11:31am	5
12:01pm	5
12:31pm	6
1:01pm	5
1:31pm	6
2:01pm	6
2:31pm	7
3:01pm	8
3:31pm	8
4:01pm	8
4:31pm	8
5:01pm	8
5:31pm	8
6:01pm	10
6:31pm	10
7:01pm	9
7:31pm	10
8:01pm	10
8:31pm	8
9:01pm	8
9:31pm	8

Min. O₃7:31am

Max. O₃9:31pm

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 Koganei

Frequently Asked Questions About Air Quality

1. What is the current O₃ level in Koganei?

The current real-time O₃ level in Koganei is 10ppb (Good). This was last updated 2026-08-03 21:21:02 (Local Time).

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

The best O₃ level was 4 ppb (Good) at 7:31 AM (Local Time) during the last 24 hours.

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

The worst O₃ level was 13 ppb (Good) at 9:31 PM, Aug 2, 2026 (Local Time) during the last 24 hours.

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

The O₃ levels in Koganei have been fluctuating throughout the last 24 hours. The levels have increased by highest 13 ppb at 9:31 PM, Aug 2, 2026 (Local Time), lowest 4 ppb at 7:31 AM (Local Time).

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

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