According to the announcement of the air quality control company in Tehran, the air pollution index of the capital is now for suspended particles less than 2.5 microns or PM2.5 with the number 126 in unhealthy conditions for sensitive groups.
🔹 According to the display of the meteorological stations, the pollution in area 19 with the number 172 is more than all the places.
The Tehran air quality index is measured with numbers that are respectively between 0 and 50 in clean or green conditions, 51 to 100 in acceptable or yellow conditions, 101 to 150 in unhealthy conditions for the sensitive or orange group, 151 to 200 in unhealthy conditions for all or red, 3 in 1 purple and very unhealthy and 301 to purple. up to 500 in dangerous or purple conditions.