Live

A21 Ozone (O₃) Level

Schwaz, Tirol, Austria

Ozone (O₃)

21ppb

Good

Last Updated: 2026-06-04 01:21:01 (Local Time)

Map

A21

Good

050

Moderate

100

Poor

168

Unhealthy

208

Severe

748

Hazardous

1250+

What is the Current O₃ Level?
A21

The current O₃ level at A21 is 21 ppb making it healthy and safe for everyone in the area.

2.4xBelow

The current O₃ level in A21 is 2.4x Below the recommended WHO guideline of 50.96 ppb.

AQI Graph

Historic Air Quality Graph of Ozone (O₃)
A21

24 Hours

O₃

A21

O₃ (ppb)

03-06-2026Time04-06-2026

Time	A21
1:31am	25
2:01am	28
2:31am	30
3:01am	30
3:31am	33
4:01am	31
4:31am	33
5:01am	31
5:31am	34
6:01am	35
6:31am	36
7:01am	38
7:31am	35
8:01am	39
8:31am	35
9:01am	40
9:31am	37
10:01am	38
10:31am	36
11:01am	34
11:31am	35
12:01pm	36
12:31pm	36
1:01pm	34
1:31pm	35
2:01pm	33
2:31pm	34
3:01pm	28
3:31pm	18
4:01pm	29
4:31pm	28
5:01pm	31
5:31pm	29
6:01pm	28
6:31pm	28
7:01pm	28
7:31pm	27
8:01pm	31
8:31pm	18
9:01pm	27
9:31pm	19
10:01pm	18
10:31pm	29
11:01pm	26
11:31pm	25
12:01am	24
12:31am	26
1:01am	21

Min. O₃3:31pm

Max. O₃9:01am

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 A21

Frequently Asked Questions About Air Quality

What is the current O₃ level in A21?

The current real-time O₃ level in A21 is 21ppb (Good). This was last updated 2026-06-04 01:21:01 (Local Time).

When was the best O₃ level in A21 in the last 24 hours?

The best O₃ level was 18 ppb (Good) at 3:31 PM (Local Time) during the last 24 hours.

When was the worst O₃ level in A21 in the last 24 hours?

The worst O₃ level was 40 ppb (Good) at 9:01 AM (Local Time) during the last 24 hours.

What is the current trend of O₃ levels in A21 during last 24 hours?

The O₃ levels in A21 have been fluctuating throughout the last 24 hours. The levels have increased by highest 40 ppb at 9:01 AM (Local Time), lowest 18 ppb at 3:31 PM (Local Time).

What actions are recommended as per the current O₃ level in A21?

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