The air quality of Tehran reached 90 on November 13, 1401

According to Moj news agency, based on the announcement of the quality control company Tehran Weather Currently, the index pollutant is “suspended particles less than 2.5 microns” with an average of 90 and the air quality is acceptable.

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 91, and the air quality of the capital was in acceptable conditions.

The concentration of pollutants was in a favorable condition until 3 o’clock this morning, but at 4 o’clock it reached the number of 101 and reached unhealthy conditions for sensitive groups. This situation has continued until now.

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”.