Live

Constanta Ozone (O₃) Level

Romania

Ozone (O₃)

24ppb

Good

Last Updated: 2026-06-04 01:11:01 (Local Time)

Map

Constanta

Good

050

Moderate

100

Poor

168

Unhealthy

208

Severe

748

Hazardous

1250+

What is the Current O₃ Level?
Constanta

The current O₃ level in Constanta based on the average air quality level across the city is 24 ppb, making it healthy and safe for everyone.

2.1xBelow

The current O₃ level in Constanta is 2.1x Below the recommended WHO guideline of 50.96 ppb.

AQI Graph

Historic Air Quality Graph of Ozone (O₃)
Constanta

24 Hours

O₃

Constanta

O₃ (ppb)

03-06-2026Time04-06-2026

Time	Constanta
1:31am	27
2:01am	27
2:31am	26
3:01am	26
3:31am	26
4:01am	27
4:31am	29
5:01am	30
5:31am	31
6:01am	31
6:31am	32
7:01am	34
7:31am	33
8:01am	33
8:31am	34
9:01am	36
9:31am	36
10:01am	33
10:31am	34
11:01am	35
11:31am	33
12:01pm	33
12:31pm	32
1:01pm	34
1:31pm	35
2:01pm	33
2:31pm	33
3:01pm	33
3:31pm	30
4:01pm	29
4:31pm	29
5:01pm	28
5:31pm	27
6:01pm	28
6:31pm	29
7:01pm	28
7:31pm	28
8:01pm	29
8:31pm	30
9:01pm	28
9:31pm	28
10:01pm	28
10:31pm	27
11:01pm	28
11:31pm	26
12:01am	26
12:31am	26
1:01am	24

Min. O₃1:01am

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 Constanta

Frequently Asked Questions About Air Quality

What is the current O₃ level in Constanta?

The current real-time O₃ level in Constanta is 24ppb (Good). This was last updated 2026-06-04 01:11:01 (Local Time).

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

The best O₃ level was 24 ppb (Good) at 1:01 AM, Jun 4, 2026 (Local Time) during the last 24 hours.

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

The worst O₃ level was 36 ppb (Good) at 9:01 AM (Local Time) during the last 24 hours.

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

The O₃ levels in Constanta have been fluctuating throughout the last 24 hours. The levels have increased by highest 36 ppb at 9:01 AM (Local Time), lowest 24 ppb at 1:01 AM, Jun 4, 2026 (Local Time).

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

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