By Azadeh Karimi


Tehran Air Quality Control Company’s real-time air quality index (AQI) ranked Tehran the sixth most polluted city in the world on November 29.

By early morning on November 29, pollution levels in Tehran reached 158 on the real-time AQI, posing severe health risks to residents.

The Tehran Municipality issued a statewide pollution warning and ordered the closure of schools, universities, and colleges in the province.

The Tehran City Council also issued a pollution warning, advising sensitive groups, such as the elderly, children, and those with respiratory or cardiovascular problems, to remain indoors.

The city also asked adults with no serious health issues to wear pollution masks as a precautionary measure when venturing outside.

Tehran’s deputy governor for urban affairs and development, Mohammad Taghizadeh, banned heavy trucks from entering the city for two days.

Sports authorities postponed a premier league match between the Tehran Persepolis and Tabriz Tractor football clubs.

The real-time AQI consists of six categories, each showing a different health concern; hazardous (above 300), heavily polluted (201-300), unhealthy (151-200), dangerous to sensitive groups (101-150), moderately polluted (51-100) and healthy (0-50).

The air quality is determined by measuring the levels of certain chemicals and compounds, including but not limited to carbon monoxide, nitrous oxide, hydrocarbons, sulfur dioxide, and lead emission and particulates, also known as atmospheric aerosol particles.

The Iranian Students News Agency (ISNA) published several photographs that showed Tehran residents, including children wearing pollution masks.

[Translated from Persian by Fardine Hamidi]