Tehran Unhealthy

Tehran, Tehran

Updated: Dec 23, 2025, 12:00 PM

Unhealthy

Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects.

Current Weather

7.3°C

Temperature

62%

Humidity

2.5

mph wind

Partly cloudy

Conditions

Pollutant Breakdown

162

PM2.5

µg/m³ · Fine particles

PM10

µg/m³ · Coarse particles

Ozone

ppb · Ground-level ozone

NO₂

ppb · Nitrogen dioxide

SO₂

ppb · Sulfur dioxide

ppm · Carbon monoxide

Dominant pollutant: PM25

PM2.5 Forecast (next 7 days)

Sun

12/21

avg

Mon

12/22

avg

Tue

12/23

avg

Wed

12/24

105

avg

Thu

12/25

114

avg

Fri

12/26

138

avg

Sat

12/27

137

avg

Health Guidance

🚫

Sensitive groups: Avoid prolonged outdoor exertion. Move activities indoors.

⚠️

General population: Reduce prolonged or heavy outdoor exertion. Take more breaks.

💨

Keep windows closed if AQI is Unhealthy or above. Use HEPA air purifiers indoors.

Data from: Iran National Air Quality Monitoring System - سامانه پایش کیفی هوای کشور, World Air Quality Index Project

Is the air safe in Tehran today?

The current Air Quality Index (AQI) in Tehran is 162, which is classified as "Unhealthy". Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects.

The AQI scale runs from 0 to 500. Values of 0–50 are Good, 51–100 are Moderate, 101–150 are Unhealthy for Sensitive Groups, 151–200 are Unhealthy, 201–300 are Very Unhealthy, and 301–500 are Hazardous.

Air quality in Tehran, Tehran is monitored by local environmental agencies and reported through the World Air Quality Index project. Data is updated hourly and includes PM2.5, PM10, ozone, nitrogen dioxide, sulfur dioxide, and carbon monoxide.

AQI Scale Reference

0–50

Good

51–100

Moderate

101–150

Unhealthy for Sensitive Groups

151–200

Unhealthy

201–300

Very Unhealthy

301+

Hazardous