Live

District 21 Air Quality Index (AQI) | Air Pollution

Real-time PM2.5, PM10 air pollution level in Tehran

Last Updated: 2026-09-27 03:01 (Local Time)

Live AQI

114AQI (US)

Air Quality is

Poor

PM2.5 : 41 µg/m³

pm10 : 82 µg/m³

Good

050

Moderate

100

Poor

150

Unhealthy

200

Severe

300

Hazardous

301+

23 °C

Last Updated: 2026-09-27 03:01 (Local Time)

Rank135^th

Currently, Tehran ranks 135^th among the most polluted cities globally.

Map

District 21

Major Air Pollutants
District 21

Particulate Matter(PM₂.₅)

41µg/m³

Particulate Matter(PM₁₀)

82µg/m³

Carbon Monoxide(CO)

436ppb

Sulfur Dioxide(SO₂)

3ppb

Nitrogen Dioxide(NO₂)

15ppb

Ozone(O₃)

4ppb

Trending in Iran

Delhi’s AQI Dropped Overnight. But Why? 🌬️

Delhi’s Pollution Season Is Arriving Early This Year

AQI Graph

Historical Air Quality Data
District 21

24 Hours

AQI (US)

District 21

AQI (US)

26-09-2026Time27-09-2026

Time	District 21
3:01am	56
3:31am	60
4:01am	50
4:31am	46
5:01am	63
5:31am	46
6:01am	46
6:31am	50
7:01am	50
7:31am	50
8:01am	46
8:31am	50
9:01am	42
9:31am	46
10:01am	50
10:31am	52
11:01am	52
11:31am	52
12:01pm	54
12:31pm	54
1:01pm	58
1:31pm	60
2:01pm	63
2:31pm	60
3:01pm	60
3:31pm	63
4:01pm	71
4:31pm	67
5:01pm	65
5:31pm	56
6:01pm	52
6:31pm	54
7:01pm	73
7:31pm	78
8:01pm	63
8:31pm	69
9:01pm	73
9:31pm	71
10:01pm	65
10:31pm	88
11:01pm	84
11:31pm	90
12:01am	88
12:31am	86
1:01am	104
1:31am	106
2:01am	97
2:31am	101
3:01am	114

Min. AQI (US)9:01am

114

Max. AQI (US)3:01am

Want air quality data?

AQI (US) Trends - Annual Air Quality Changes
District 21, Tehran, Tehran Province, Iran

AQI (US)

Iran's Metro Cities
Air Quality Index

Hamadan

Karaj

Mashhad

Shiraz

Tabriz

Tehran

Air Quality Calendar 2026
District 21

2026

AQI (US)

Health Advice For People Living In
District 21

0Cigarettes per day

Weekly 0 Cigarettes

Monthly 0 Cigarettes

Breathe easy and get active! The air quality is perfect for enjoying outdoor activities.

Source:

Berkeley Earth

Disclaimer: This cigarette-equivalent estimate is based on the average PM2.5 concentration over the last 24 hours, assuming continuous exposure during that time.

Solutions for Current AQI (US)

Air PurifierTurn On

Car FilterMust

N95 MaskMust

Stay IndoorMust

Prevent Health Problems: Understand Your Risks

District 21

Asthma

Heart Issues

Allergies

Sinus

Cold/Flu

Chronic (COPD)

Disclaimer: The above health risks are precautionary suggestions based on current AQI levels. You may not feel the effects immediately, but prolonged exposure to air pollution can contribute to these health conditions over time. AQI.IN is neither a medical expert nor a provider of medical advice. Please consult a doctor if you experience any of the above similar symptoms.

Most Polluted Cities 2026
Iran

Analyze the real-time most air polluted cities in the country.

Most Polluted Cities Live Ranking 2026

World's Most PollutedCity Rankings (2025)

World's Most PollutedCountry Rankings(2025)

RankCityAQI Status

Standard Value

Bandar Abbas, Hormozgan

Unhealthy

5xabove Standard

Bam, Kerman

Unhealthy

5xabove Standard

Zabol, Sistan Va Baluchestan

Unhealthy

5xabove Standard

Birjand, Khorasan E Jonubi

Poor

4xabove Standard

Zarand, Kerman

Poor

4xabove Standard

Ilam, Ilam

Poor

3xabove Standard

Kermanshah, Kermanshah

Poor

3xabove Standard

Nazarabad, Alborz

Poor

2xabove Standard

Khorramabad, Lorestan

Poor

2xabove Standard

10.

Shahr E Jadid E Hashtgerd, Alborz

Poor

2xabove Standard

Last Updated: 26 Sept 2026, 11:32 PM

AQI City Rankings

Air Quality Solutions For District 21
Explore the solutions of air quality monitoring & clean air.

Here are some applications that you can go through to find out the solutions.

Air Quality Monitor

Monitor the air quality

Air Quality Sensors

Sensors to measure the air quality

Fresh Air Machine

Clean the air you breathe

Car Cabin Filter

Purify the air in your car

N95 Mask

Shield yourself from pollution

Prana Air offers the solutions of air quality monitoring and clean air machine for District 21

Air Quality Solution For Offices

A complete solution for air quality monitoring, data analysis, and fresh air solutions in workplaces prioritizing employee's health and productivity.

Air Quality Solutions For Smart City

Prana Air smart city project provides air quality monitors, drones, outdoor air purifiers, and data dashboards solution to improve air quality.

Air Quality Solutions for Schools | Institutes

Prana Air provides the air quality solutions for schools by air monitoring & fresh air machine that help the students to breather clean air.

Air Quality Solutions For Hotels

Prana Air air quality solutions are suited for hotel businesses. The occupancy of hotels is the main reasons for bad air quality.

Air Quality Solutions for Restaurants

Prana Air has the air quality solutions for restaurant, cafes, and gives you the power to know what your customers and staff breathe.

Air Quality Solutions for RMC Plants

Prana Air provides air quality monitoring solutions for RMC plants. Improve compliance, protect workers and community, and reduce emissions.

Air Quality Solutions for Fitness Center

Prana Air provides the air quality solutions of pollution monitoring and fresh air for fitness center - gym.

Air Quality Solutions for Parking Lot

A complete solution for air monitoring, data analysis, and fresh air solutions for enclosed car parking areas and car lots.

Air Quality Solutions for Retail Stores

Prana Air provides air quality solutions of pollution monitoring and fresh air for retail stores and shopping outlets.

Prana Air provides air quality solutions of pollution monitoring and fresh air for retail stores and shopping outlets

Prana Air provides the air quality solutions for airport. Gathering of many passengers is the main reasons of bad air quality in airport.

Air Quality Solutions For Construction Sites

Prana Air offers air quality monitoring solutions for construction sites with data cloud storage, web-dashboard, mobile apps, TV display.

Air Quality Solutions For Hospitals

Prana Air provides air quality monitoring and fresh air solutions for hospitals to ensure clean and healthy indoor air.

Air Quality Solutions For Washroom | Bathroom

Improve washroom and bathroom air quality with Prana Air air quality monitoring devices and fresh air machine. Breathe easy and stay healthy.

Air Quality Solutions for Banks

Prana Air provides air quality solutions of pollution monitoring and fresh air for banks and financial institutions.

Air Quality Solutions for Cinema

Air quality solutions for cinema halls or theatres will help the customers to get the good experience, comfort and breathe clean air.

Air Quality Solutions For Real Estates

Prana Air provides the air quality solutions of pollution monitoring and fresh air for real estates - residential and commercial.

District 21's AQI Data Analytics Solutions
Air quality data monitoring platforms

Mobile App

Smart TV App

Web Dashboard

API

Widgets

Air Quality FAQs
at District 21

Frequently Asked Questions About Air Quality

1. What is the current AQI (US) level in District 21?

The current real-time AQI (US) level in District 21 is 114 (Poor). This was last updated 2026-09-27 03:01 (Local Time).

2. When was the best AQI (US) level in District 21 in the last 24 hours?

The best AQI (US) level was 42 (Good) at 9:01 AM (Local Time) during the last 24 hours.

3. When was the worst AQI (US) level in District 21 in the last 24 hours?

The worst AQI (US) level was 114 (Poor) at 3:01 AM, Sep 27, 2026 (Local Time) during the last 24 hours.

4. What is the current trend of AQI (US) levels in District 21 during last 24 hours?

The AQI (US) levels in District 21 have been fluctuating throughout the last 24 hours. The levels have increased by highest 114 at 3:01 AM, Sep 27, 2026 (Local Time), lowest 42 at 9:01 AM (Local Time).

5. What actions are recommended as per the current AQI (US) level in District 21?

Current AQI (US) levels are unhealthy for Sensitive individuals, they should reduce prolonged or heavy outdoor exertion.