The contractors are Tekken Corporation, Abdul Monem Ltd, and Abenikko
The Department of Environment (DoE) mobile court, led by Magistrate Kazi Tamzid Ahmed, imposed the fine on Wednesday.
The contractors - Tekken Corporation, Abdul Monem Ltd, and Abenikko - were jointly responsible for the construction work of the railroads that run from Uttara to Motijheel under contract number CT5.
The magistrate told Dhaka Tribune: "The contractors were accused of further contributing towards air pollution through the use of their construction equipment in the open spaces ; therefore we have imposed the fine upon them."
This feat was carried out immediately after the High Court, in a bid to reduce air pollution, handed down five directives to the authorities concerned.