Worst air pollution Tehran, today and tomorrow
Today (9 August): Air quality in Tehran is fair. PM2.5, SO2, HCHO, and PM1 are fair; AQI, NO2, and O3 are medium; PM10 and CO are good. Pollution peaks around 11:30 PM (NO2: 48.4/100).
Tomorrow (10 August 2026): Air quality in Tehran is poor. AQI worsens to poor; O3 increases to poor; SO2 decreases to medium; all other pollutants stay as today. Pollution peaks around 2:30 PM (O3: 70.0/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Tehran's air quality reflects the Alborz Mountain base's enclosed Tehran Plain at 1,200 metres, with vehicle traffic on surrounding expressways and the extraordinary vehicle density, oil refinery, and industrial corridor generating severe PM2.5 under persistent winter inversions. The Alborz Mountain wall creates near-complete topographic trapping, while the flat Kavir Desert to the south allows dust transport and Tehran maintains among the Middle East's most severely topographically challenged major capital environments throughout the year.
Today - 9 August | Pollution peaks at 23:30
AQI:
Medium
48.4/100
PM2.5 (fine particles):
Fair
22.3/100
PM10 (coarse particles):
Good
7.7/100
NO2 (nitrogen dioxide):
Medium
48.4/100
O3 (ozone):
Medium
43.7/100
SO2 (sulfur dioxide):
Fair
40.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
20.0/100
PM1 (ultrafine particles):
Fair
26.3/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 14:30
AQI:
Poor
70.0/100
PM2.5 (fine particles):
Fair
31.0/100
PM10 (coarse particles):
Good
11.1/100
NO2 (nitrogen dioxide):
Medium
51.6/100
O3 (ozone):
Poor
70.0/100
SO2 (sulfur dioxide):
Medium
44.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Fair
24.0/100
PM1 (ultrafine particles):
Fair
36.4/100
Frequently Asked Questions
Is air quality bad in Tehran right now?
On 9 August 2026, overall air quality in Tehran is fair. SO2 is the main pollutant at 40.0/100. Pollution peaks around 11:30 PM (NO2: 48.4/100).
Will air quality be worse tomorrow in Tehran?
On 10 August 2026, air quality conditions in Tehran will be worse than today, with AQI forecast at poor at 70.0/100. Pollution peaks around 2:30 PM (O3: 70.0/100).
When is air pollution at its worst in Tehran?
Air quality in Tehran tends to be worse when vehicle traffic, steel, cement, and chemical production, and port and shipping activity build up and dry spells bring strong winds. Dust carried on these winds adds substantially to particulate levels. These episodes tend to cluster in spring and autumn.
Are air quality levels in Tehran based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 9 August 2026 at 20:27 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
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