According to the city correspondent of Fars News Agency, according to the announcement of the Tehran Air Quality Control Company, the air quality index is currently at 108, which means it is in the unhealthy range for sensitive groups.

Also, in the last 24 hours, Tehran’s air index was at 100 and was in an acceptable condition.

It should be mentioned that the air quality is divided into five main categories, based on which the number from zero to 50 is defined as clean air, from 51 to 100 the air is acceptable or average, and from the range 101 to 150 the air is unhealthy. It is for sensitive groups. Also, from 151 to 200 is unhealthy for all groups, from 201 to 300 the air is very unhealthy and from 301 to 500 the air quality conditions are dangerous.

It should be noted that since the beginning of this year, Tehran has experienced 8 days of clean air, 84 acceptable days, 21 unhealthy days for sensitive groups and one unhealthy day for all groups.

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