Tehran Air Quality
Iran · 35.69, 51.39 · hour of 2026-10-06 21:00 UTC
143US AQI
Unhealthy (Sensitive)Category
94.8PM2.5 (µg/m³)
105.5PM10 (µg/m³)
0O3 (µg/m³)
114.4NO2 (µg/m³)
78.5SO2 (µg/m³)
2,478CO (µg/m³)
What this means
Tehran currently ranks #6 of 50 tracked cities for PM2.5 (1 = most polluted). Its PM2.5 level of 94.8 µg/m³ is 6.3× the WHO 24-hour guideline of 15 µg/m³. A US AQI of 143 falls in the “Unhealthy (Sensitive)” band; see the health guide for what each band means.
Figures are hourly values from the Open-Meteo Air Quality API, modelled from Copernicus CAMS forecasts for the city-centre coordinates rather than read from a single ground station. Concentrations are in micrograms per cubic metre; the US AQI follows EPA breakpoints and reports the worst pollutant. Data is cached for 15 minutes.