The air quality of Tehran reached 117 on November 20, 1401

According to Moj News Agency, according to the announcement of Tehran Air Quality Control Company, the current index pollutant is “suspended particles less than 2.5 microns” with an average of 117 and the air quality is in an unhealthy state.

The pollutant index of the capital’s air during the last 24 hours was “suspended particles less than 2.5 microns” with an average of 128, and the air quality of the capital was in an unhealthy condition.

Air quality (AQI) is divided into five main categories; Based on this division, from zero to 50 “clean” air, from 51 to 100 “acceptable (healthy) or average” air, from 101 to 150 “unhealthy for sensitive groups”, from 151 to 200 “unhealthy for all” groups”, from 201 to 300 air is “very unhealthy” and from 301 to 500 air quality conditions are “dangerous”.