air quality index

EghtesadOnline: According to data released by Tehran Air Quality Control Company, Tehran’s air quality was “good” on only four days in the fiscal 2022-23.

EghtesadOnline: Air Quality Index in Tehran on Tuesday hovered around 130, above the threshold of "unhealthy for sensitive groups", which has pushed authorities to take a further drastic measure to curb the smog.

EghtesadOnline: In April, Tehran’s residents experienced some relief after air quality index (AQI) improved in comparison with the same month of last year, according to data from Tehran Air Quality Control Company.