According to KhabarOnline, the current average air quality in Tehran is at an index of 101, indicating an orange status that is unhealthy for sensitive groups. In a report, it was noted that during unhealthy conditions, individuals with heart or lung diseases, the elderly, and children should reduce prolonged or strenuous outdoor activities.

Since the beginning of this year, Tehran’s air quality has been classified as acceptable for 159 days, unhealthy for sensitive groups for 139 days, unhealthy for all for 27 days, clean for 6 days, very unhealthy for 2 days, and hazardous for 2 days.

It is noteworthy that the Air Quality Index (AQI) is divided into six main categories. According to this classification, an index from 0 to 50 indicates “clean” air, from 51 to 100 indicates “acceptable or moderate” air, from 101 to 150 indicates “unhealthy for sensitive groups,” from 151 to 200 indicates “unhealthy,” from 201 to 300 indicates “very unhealthy,” and from 301 to 500 indicates “hazardous” air quality.