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District 21 Air Quality Index (AQI) | Air Pollution

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

Last Updated: 2026-07-28 13:01 (Local Time)

location image
Live AQI
74AQI (US)
Air Quality is
Moderate
PM2.5 :  17 µg/m³
pm10 :  103 µg/m³
Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+
aqi moderate level.webp in District 21
sunny

33 °C

Sunny
Humidity
Humidity14 %
Wind Speed
Wind Speed18 km/h
UV Index
UV Index9.8
Last Updated: 2026-07-28 13:01 (Local Time)
Rank302nd

Currently, Tehran ranks 302nd among the cities with the highest AQI levels in the world.

Map

District 21

Major Air Pollutants

District 21

PM₂.₅'s Icon

Particulate Matter(PM₂.₅)

17µg/m³

PM₁₀'s Icon

Particulate Matter(PM₁₀)

103µg/m³

CO's Icon

Carbon Monoxide(CO)

271ppb

SO₂'s Icon

Sulfur Dioxide(SO₂)

2ppb

NO₂'s Icon

Nitrogen Dioxide(NO₂)

5ppb

O₃'s Icon

Ozone(O₃)

26ppb

AQI Graph

Historical Air Quality Data

District 21

24 Hours
AQI (US)
District 21
AQI (US)
.
27-07-2026Time28-07-2026
42
Min. AQI (US)12:31am
100
Max. AQI (US)3:31am

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 City AQI

Hamadan

57

temp.35°C
hum.11%
Karaj City AQI

Karaj

64

temp.32°C
hum.18%
Mashhad City AQI

Mashhad

51

temp.36°C
hum.14%
Shiraz City AQI

Shiraz

86

temp.37°C
hum.8%
Tabriz City AQI

Tabriz

37

temp.34°C
hum.22%
Tehran City AQI

Tehran

69

temp.33°C
hum.14%

Air Quality Calendar 2026

District 21

2026
AQI (US)
Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+

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 Purifier
Air PurifierTurn On
Car Filter
Car FilterMust
N95 Mask
N95 MaskMust
Stay Indoor
Stay IndoorMust

Prevent Health Problems: Understand Your Risks

District 21

asthma due to air pollution in District 21Asthma
heart due to air pollution in District 21Heart Issues
allergy due to air pollution in District 21Allergies
sinus due to air pollution in District 21Sinus
flu due to air pollution in District 21Cold/Flu
copd due to air pollution in District 21Chronic (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

Follow

1.

Banak, Bushehr

125

Poor

3xabove Standard

2.

Shiraz, Fars

86

Moderate

2xabove Standard

3.

Ahvaz, Khuzestan

80

Moderate

2xabove Standard

4.

Shushtar, Khuzestan

78

Moderate

2xabove Standard

5.

Bandar E Mahshahr, Khuzestan

78

Moderate

2xabove Standard

6.

Masjed Soleyman, Khuzestan

78

Moderate

2xabove Standard

7.

Behbahan, Khuzestan

77

Moderate

2xabove Standard

8.

Dezful, Khuzestan

77

Moderate

2xabove Standard

9.

Madan, Khuzestan

76

Moderate

2xabove Standard

10.

Khorramabad, Lorestan

76

Moderate

1xabove Standard

Last Updated: 28 Jul 2026, 09:47 AM

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

Air Quality Monitor

Monitor the air quality
Air Quality Sensors

Air Quality Sensors

Sensors to measure the air quality
Fresh Air Machine

Fresh Air Machine

Clean the air you breathe
Car Cabin Filter

Car Cabin Filter

Purify the air in your car
N95 Mask

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.

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

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.

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

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.

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

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.

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

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.

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

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.

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

Air Quality Solutions for Fitness Center

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

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

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.

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

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

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.

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

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.

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

Air Quality Solutions For Hospitals

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

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

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.

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

Air Quality Solutions for Banks

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

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

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.

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

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 AppMobile App
Smart TV AppSmart TV App
Web DashboardWeb Dashboard
APIAPI
WidgetsWidgets

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 74 (Moderate). This was last updated 2026-07-28 13:01 (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 12:31 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 100 (Moderate) at 3:31 AM (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 100 at 3:31 AM (Local Time), lowest 42 at 12:31 AM (Local Time).

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

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

Recent AQI Blogs

Read the latest news

Here are some latest blogs that you can go through to find out more air pollution.

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Kitchen Air Pollution: How Cooking Can Spike Your Indoor AQI

17 Mar 2026Gyane Haobijam
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Why AQI Standards Vary Across the World - And Why Air Quality Index Matters More Than Ever

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2 Feb 2026Gyane Haobijam
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1 Feb 2026Gyane Haobijam
Prana Air Logo

Prana Sense

Air Quality Monitor

Air Quality Index depicts the extent of air pollution at a particular location.

Prana Air Ambient Air Quality Monitor - most realiable outdoor aqi monitoringPrana Air Ambient Air Quality Monitor - most realiable outdoor aqi monitoring
Prana Air Logo

Pocket PM

Air Quality Monitor

Know the air quality around you wherever you are with the Pocket monitor to get instant air quality insights.

Prana Air Pocket PM2.5 Air Quality Monitor - portable, smallest and afforablePrana Air Pocket PM2.5 Air Quality Monitor - portable, smallest and afforable
Prana Air Logo

Cair +

Indoor Air Quality Monitor

Track indoor air quality with advanced connectivity and portability for real-time air quality data.

Prana Air Cair+ Indoor Air Quality Monitor for home, office or institutesPrana Air Cair+ Indoor Air Quality Monitor for home, office or institutes