Live

Cossipore Ozone (O₃) Level

Kolkata, West Bengal, India

Ozone (O₃)

123ppb

Poor

Last Updated: 2026-08-08 17:51:01 (Local Time)

Map

Cossipore

Good

050

Moderate

100

Poor

168

Unhealthy

208

Severe

748

Hazardous

1250+

What is the Current O₃ Level?
Cossipore

The current O₃ level at Cossipore is 123 ppb so everyone should stay cautious in the area.

2.4xAbove

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

AQI Graph

Historic Air Quality Graph of Ozone (O₃)
Cossipore

24 Hours

O₃

Cossipore

O₃ (ppb)

07-08-2026Time08-08-2026

Time	Cossipore
6:01pm	66
6:31pm	61
7:01pm	84
7:31pm	89
8:01pm	103
8:31pm	97
9:01pm	97
9:31pm	91
10:01pm	102
10:31pm	109
11:01pm	109
11:31pm	116
12:01am	100
12:31am	102
1:01am	111
1:31am	101
2:01am	108
2:31am	107
3:01am	79
3:31am	81
4:01am	103
4:31am	108
5:01am	109
5:31am	100
6:01am	116
6:31am	109
7:01am	102
7:31am	99
8:01am	99
8:31am	114
9:01am	101
9:31am	29
10:01am	30
10:31am	33
11:01am	33
11:31am	31
12:01pm	102
12:31pm	101
1:01pm	89
1:31pm	94
2:01pm	86
2:31pm	86
3:01pm	81
3:31pm	91
4:01pm	86
4:31pm	85
5:01pm	100
5:31pm	103

Min. O₃9:31am

116

Max. O₃11:31pm

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 Cossipore

Frequently Asked Questions About Air Quality

1. What is the current O₃ level in Cossipore?

The current real-time O₃ level in Cossipore is 123ppb (Poor). This was last updated 2026-08-08 17:51:01 (Local Time).

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

The best O₃ level was 29 ppb (Good) at 9:31 AM (Local Time) during the last 24 hours.

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

The worst O₃ level was 116 ppb (Poor) at 11:31 PM, Aug 7, 2026 (Local Time) during the last 24 hours.

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

The O₃ levels in Cossipore have been fluctuating throughout the last 24 hours. The levels have increased by highest 116 ppb at 11:31 PM, Aug 7, 2026 (Local Time), lowest 29 ppb at 9:31 AM (Local Time).

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

Current O₃ levels are unhealthy for Sensitive individuals, they should reduce prolonged or heavy outdoor exertion.