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East 191st Street Ozone (O₃) Level

Noblesville, Indiana, United States

Ozone (O₃)

62ppb

Moderate

Last Updated: 2026-07-15 19:11:01 (Local Time)

Map

East 191st Street

Good

050

Moderate

100

Poor

168

Unhealthy

208

Severe

748

Hazardous

1250+

What is the Current O₃ Level?
East 191st Street

The current O₃ level at East 191st Street is 62 ppb making it acceptable, but sensitive individuals should be cautious.

1.2xAbove

The current O₃ level in East 191st Street is 1.2x Above the recommended WHO guideline of 50.96 ppb.

AQI Graph

Historic Air Quality Graph of Ozone (O₃)
East 191st Street

24 Hours

O₃

East 191st Street

O₃ (ppb)

14-07-2026Time15-07-2026

Time	East 191st Street
7:31pm	57
8:01pm	54
8:31pm	53
9:01pm	56
9:31pm	50
10:01pm	47
10:31pm	42
11:01pm	38
11:31pm	39
12:01am	39
12:31am	29
1:01am	26
1:31am	27
2:01am	18
2:31am	20
3:01am	15
3:31am	15
4:01am	16
4:31am	20
5:01am	16
5:31am	17
6:01am	17
6:31am	18
7:01am	16
7:31am	17
8:01am	17
8:31am	16
9:01am	17
9:31am	17
10:01am	18
10:31am	15
11:01am	17
11:31am	18
12:01pm	36
12:31pm	34
1:01pm	37
1:31pm	43
2:01pm	45
2:31pm	47
3:01pm	47
3:31pm	50
4:01pm	67
4:31pm	63
5:01pm	59
5:31pm	62
6:01pm	58
6:31pm	65
7:01pm	62

Min. O₃3:01am

Max. O₃4:01pm

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 East 191st Street

Frequently Asked Questions About Air Quality

1. What is the current O₃ level in East 191st Street?

The current real-time O₃ level in East 191st Street is 62ppb (Moderate). This was last updated 2026-07-15 19:11:01 (Local Time).

2. When was the best O₃ level in East 191st Street in the last 24 hours?

The best O₃ level was 15 ppb (Good) at 3:01 AM (Local Time) during the last 24 hours.

3. When was the worst O₃ level in East 191st Street in the last 24 hours?

The worst O₃ level was 67 ppb (Moderate) at 4:01 PM (Local Time) during the last 24 hours.

4. What is the current trend of O₃ levels in East 191st Street during last 24 hours?

The O₃ levels in East 191st Street have been fluctuating throughout the last 24 hours. The levels have increased by highest 67 ppb at 4:01 PM (Local Time), lowest 15 ppb at 3:01 AM (Local Time).

5. What actions are recommended as per the current O₃ level in East 191st Street?

Current O₃ levels are acceptable; however, some pollutants may be a concern for a small number of sensitive individuals.